Newage/Stamford SX440 AVR

We have a Coleman 50KW Generator that was dropped and the 3 voltage selector switch was broken. It was taken apart an repaired to put out, but the wires had all been disconnected by the customer. It has a SX 440 AVR and when we wire it for 480/277 we only get 401 volts and we are very uneasy with the way the ARR is connected. It has 10 term. across the top L to R is K2 K1 P2 P3 P4 XX X 3 2 1. Can someone give the correct connections for these?

Joe