I can only read the right side white sticker.
It says "PASS SIDE FTR S/O CTL"
Translation - Passenger side front slide out controler
You have 3 slides, and these are controllers for them.
I can't read the middle and left one because your picture has wires in the way.
But im 99% these are your slide out controllers based on all the words I can see.
1998 Prevost Vogue XL 40' Riveted
500HP Detroit Diesel, side radiator, tag axle, IFS
We have RV'ed in ALL of the lower 48 and into Canada.
2019 Fleetwood *SOLD*