i ended up not taking pictures since i didn't work with much free time today, but i already refurbished the two speakers, there was a lot of rust and dirt inside!
now the main unit needs work: tape is dead, aux has a pin stuck in RCA jack and switches are all scratchy
other than that i'm really happy to work on this and i'm really glad i got the speakers working like new! i even replaced the wires that connect it to the main unit since they were really tatty and already patched mismatching