The junction block brings the power from the main 40 amp relay and its two circuits...the yellow-red 12 gauge wire in the middle, and the red 12 gauge wire...AND the 10 gauge yellow wire for the new override circuit...to the 10 gauge yellow wire that goes through the floor board to the chassis pump.

Where the two red wires split off from each other: that second red wire is the auxiliary feed to the intank pump, which is a 740T intank pump.

The twin white cable is the coaxial cable for the pre-outs from my radio to the amplifier in the back storage area.

Those two large black cables are the 2 gauge battery cables that go back to the rear mounted battery.