77 dodge power wagon warlock radio diagram

i need a little assistance in locating the diagram for the radio on my truck the old one was an aftermarket dial radio and it went out. i am pretty sure the ground is just screwing the ground wire to the dash and im pretty sure my red wire is the hot. cant figure out wich one is the acc wire and which are my speakers.

Should be an orange for light dial, red for switched 12volts and green for speaker along with a black one.