Okay, well there's three speaker wires that run from the HU to the Bose amp connector (the larger connector); brown (left +), dark blue (right +), and green/white (speaker common). The additional wires that run to the rear sail panel speakers from the amp connector are dark blue/white (left +), light green/black (left -), dark green (right +), light blue/black (right -).
The left front speaker should have a tan wire (left +), and white wire (front common), and the right front should have a light green (right +), and also the white common wire. These come directly from the HU.
I would work on getting the fronts working first, since they don't use any of the wiring from the rear amp. There are also power wires running to the front speakers (orange is +, black -), which were used by the Bose speaker/amp enclosures to amplify the signal at the speaker location. They should not be used with your set up.
1995 Firehawk #528 resto-mod underway
Planned 383 rebuild: 195cc competition LT4 AFR heads, custom cam grind (still debating specs), 6" or 5.85" rods, forged internals
Upgraded T56: Viper mainshaft and 2nd gear, steel 3/4 shift fork, Billet keys 1-4, bronze shifter cup, internals Cryo'd and REM'd