it appears they cut out the flasher circuit and one of the rotators.
As it appears:
-The cut red wire is for the other rotator, that should go to positive
-The orange wire appears to be positive for the flasher module, the cut end should connect to the missing flasher.
-The green and yellow wires should connect to the output terminals on the flasher.
-Also i see some cut ground wires, just make sure that all the bulbs and motors have their paths back to the ground terminal, i cant really make out where that one is coming from/goes to.
I wouldn't know for sure what flasher it would have used but i would make a guess of a fed sig FA3 flasher.