Cant locate wires for signals

[Brandenfwee]

Hey guys. I recently bought a 1980 xs400 and its in pretty good condition. Just needed tires, lights, etc. wrll I got new tires and I wired up a new tag light. The signals themselves were not attached when I bought it but they came with it. Now Im trying to put them on but I cant find any power wires to connect to. I have 2 ground wires with the circular end on them which im assuming go to each one. But its pretty much a wiring mess under the seat. Does anyone know where to look? What color they are? Etc? It would really help me out because I have 10 days according to nc law to have it inspected and I didnt want to pay any1 to do this simple task if I could help it. Thanks everyone.

 

[hmusket]

The wires from the harness should be underneath or close by the fender. Left signal brown with black for ground. Right signal dark green with black for ground. Circular end goes on stem before attaching nut. You'll probably also have to open up the headlight to make sure wires are connected inside shell.
Online manual:
View attachment 3882
Look on page 29 for the wiring diagram.
Another wiring diagram from jayel:
View attachment 4786