1994 Fleetwood Flair speaker wiring ?

[newbe2rv]

I don't have a wiring diagram for my motorhome and was wondering if someone here might be able to tell me about the factory speaker wires,there are 6, purple,white,green,blue,orange,brown, it looks like all are solid color (no stripe) and it's a four speaker system. I am trying to add a new single din unit and being electronically challenged I would really like to avoid frying anything..........would really appreciate any help......thanks