1987 Washburn Force ABT B-15

Hi I recently acquired a 1987 Force ABT B-15 for free and would like any information possible. I'm mainly a six string guy but I really liked the feel and look of this bass. It works and sounds great but there are some issues:

-The bridge was a chrome aftermarket top load and looked cheap, so I threw some individual string-through-body saddles on instead.
-There are missing gear covers on the back of two tuning machines
-It sounds like it has a bad output jack so I bought a new stereo jack but still need to wire it up... which brings me to my next point...
-the internal wiring is a mess. I'm not sure if it comes from the factory like this or not but several wires are spliced together and taped with green electrical tape. It looks like there is a nail that was driven into the body and electrical taped to the old mono jack, I assume to act as a ground.

So here is what I'm looking for because I would like to restore this to like new condition:
1. Any detailed photos of the inside of the wiring compartment
2. Original instruction manual and/or wiring diagrams
3. A source for genuine Washburn replacement parts for a bass this old

I'll post picks as soon as I can!