The 2260 never came with disconnects to my knowledge, I had to buy them separately but it was worth the cost, especially when it comes time to do maintenance. I forgot you don't have them.
I've never had a problem with the valve handle on the drain tap opening accidentally by bumping it. You might be able to find a rubber tip or plug to fit the valve end to act as a cap. If you have children or dogs that have access to that valve, consider getting a garden hose quick connect coupling with a valve, use a small piece of hose that fits the barb on the drain tap and use that as extra security. I use one of those to connect to a garden hose when I want to drain my filter for maintenance.
The proper way to prime an Eheim Classic filter is to have NO water in the filter. Since you do not have the quick disconnect fittings, my suggestion is to make sure the intake strainer is under water, remove the hose from the spraybar and suck on the end of the hose. This will start drawing water from the aquarium and filling the canister full of water. You can reconnect the hose to the spraybar while you are waiting for the canister to fill with water but keep the spraybar elevated above the tank water.
This method allows all the air to be evacuated from the filter so that only water remains in the filter. Once you see that the water has reached the rim of the aquarium or starts to dribble out of the spraybar, you can place the spraybar in the clips/suction cup holders. Make sure the spraybar holes are facing down towards the aquarium.
Double check the filter to make sure that there is no water leaking out of any of the connections, fittings, pump, filter lid, hoses or the drain tap. Also check the hoses behind the tank for water drops or dribbling.
Now you can plug in the mains (plug) into the wall socket or power strip. You may still see some air coming out of the spraybar but it should dissipate quickly.
Double check that no water is coming out of the fittings, hoses, pump, filter lid and other connections.
Enjoy the new filter, I'm sure you will be impressed by it.
I've never had a problem with the valve handle on the drain tap opening accidentally by bumping it. You might be able to find a rubber tip or plug to fit the valve end to act as a cap. If you have children or dogs that have access to that valve, consider getting a garden hose quick connect coupling with a valve, use a small piece of hose that fits the barb on the drain tap and use that as extra security. I use one of those to connect to a garden hose when I want to drain my filter for maintenance.
The proper way to prime an Eheim Classic filter is to have NO water in the filter. Since you do not have the quick disconnect fittings, my suggestion is to make sure the intake strainer is under water, remove the hose from the spraybar and suck on the end of the hose. This will start drawing water from the aquarium and filling the canister full of water. You can reconnect the hose to the spraybar while you are waiting for the canister to fill with water but keep the spraybar elevated above the tank water.
This method allows all the air to be evacuated from the filter so that only water remains in the filter. Once you see that the water has reached the rim of the aquarium or starts to dribble out of the spraybar, you can place the spraybar in the clips/suction cup holders. Make sure the spraybar holes are facing down towards the aquarium.
Double check the filter to make sure that there is no water leaking out of any of the connections, fittings, pump, filter lid, hoses or the drain tap. Also check the hoses behind the tank for water drops or dribbling.
Now you can plug in the mains (plug) into the wall socket or power strip. You may still see some air coming out of the spraybar but it should dissipate quickly.
Double check that no water is coming out of the fittings, hoses, pump, filter lid and other connections.
Enjoy the new filter, I'm sure you will be impressed by it.