I didn’t! I tried to document it but failed due to the tight spaces. I eventually connected both sides of the lights by using the wheel well space. You need something to fish the wires down. Wire works. The holes are big enough to drop the connector through.Did you ever get a reasonable answer to your question about how the lights are connected? If not, the lighting strips specifically for truck beds include the extra wiring. You run those connecting wires under the rear bumper. Included directions.
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