can't find wires for 95 astro van

[peachavenuebooks]

we have our van ripped apart it is a custom van so there is no jack compartment where it should be. we can't find the right wires to hook up the wiring kit. we have 6 wires 3 brown wires a black wire and a light green and a dark green. we don't know where they go to. or how to hook up the hoppy wiring kit. HELP if you can.
thanks