Definitely a Scobinancistrus:
https://www.planetcatfish.com/common/genus.php?genus_id=73#4580
Scobins with yellows are the 253 and the 014
Definitely not an L014 as they have a yellow laminate on their tail, dorsal and fins.
253 lack the laminates, have lots of spots when compared to other Scobins and have hints of yellow around its body
Your first batch of photos makes the fish look like it has yellows but the second batch of photos makes the fish look more black and white.
If they are actually yellow in person, you can assume it is a 253, which is a very rare pleco (congrats).
However, if you can confirm that they are not yellow in person, I would presume that they are an L048. 048 is another scobin that is the second most commonly imported scobin (behind L014) which would be a lot more possible to mistake for a 14; as opposed to mistaking a 253 for a 14, which is a much more expensive and rare fish.
It also could be an L082, another scobin, but those guys have very flat bodies which I do not think yours would fit the bill.
Goggy