Help identifying wires in 75 Argosy above couch

[Jum]

These are in the tambour door storage above the couch.

I'm installing a small bluetooth amp and a new pair of speakers at the sides of the couch, powering the amp from the driver side reading light and am puzzled with these wires.

I thought the single white and single black were 12v and ground, but there is no voltage there. The 2x white pairs you would think are for the speakers but the blue pairs go to those and both of the white pairs head toward passenger side.

There is no central control center in it, just 2x tambour doors.

Any ideas? Should I not worry about them and just cut/clean up things or save them for later 'just in case'?

[Im2bent]

Is there possibly a switch nearby controlling voltage to the wire? If you get no voltage going from either wire to a good ground on the airstream you can then check continuity to see if any of them are ground wires

[Trnpk Crsr]

My parents' '75 had an AM/FM 8 track in this space. There were two sets of speakers. One pair was in the front and another pair was next to the beds. I never saw the wiring behind the radio.

Cheers,

John