Repaired Neg wires for D2000 with Oemer's help.

Cable #2 is fine. 

In Cable #4, wires 1 and 2 are swapped but it's impossible this happened when the connector came apart. The pins are crimped and secured with a screw. Most likely it was sold like this and there's no difference between wire 1 and 2 (same voltage).

Edit: SAES confirmed 1&2 are interchangeable.