Holiday Rambler in tank fuel pump quit. Cant find relay?

Thanks but not a GM. Its a pusher rear engine with a cummins diesel.
No hood. Small fuse box in rear lower battery cabinet and large fusebox in outside cabinet below drivers window.
Fuses and relays labeled but none labeled as fuel pump so kind of stumped.
Just learned Monaco/Holiday Rambler lost all pre 2011 records, diagrams and schematics in a fire darn it, so on my own it appears.