60 inch tail light tap into factory harness- reverse light tap- 2022 Chevrolet Silverado 1500

So I purchased a 60inch light bar from Amazon, they’re all wired the same, I have a 5 function light. I installed this on a 2022 Chevy Silverado but I couldn’t figure how to tap into the harness to hook up the reverse light, no online diagrams aligned with the colors in my tail light. This should be the same for most newer gmc vehicles, hope this helps!
I purchased a 7pin extender harness from Amazon (Metco) so I didn’t have to cut my factory wires at the trailer harness, that took me about 1 minute to connect, however, the extender didn’t have the extra wire I needed to connect the reverse lights. I highly recommend the t connectors because there’s no wiggle room to splice, the wires are pretty tight.
Hope this helps!