I have aboss head unit in 95 max with cd player and tape player. NO CD CHANGER. I was wondering if anyone has switched their "tape" button, to an aux switch like an after market head unit. Meaing for those who dont understand. I can hook up say X-Box's sound through my head unit with the proper adapter, hit the tape button, so the car things is turning on a tape but in actuallity ive tricked the car and know its playing xboxs audio. Tape button works as an AUX.

-the adaptor --which I would need to no which one, I have something thats called an Tsunami Adjustable line output converter, it has 4 wires to splice with someting in a stock herad unit and other side it has red and black audio cables)---it was used to play a system with stock head unit in another vehcile.

I no boss is tricky and changing one thing changes everything, but its simply turning tape button in aux, i just need to no which wires to splice and if its possible.
Anything would help