More connector help

[brental1]

I'm in the (hopefully) last stages of wiring my 2022 BH for swapping in heated/vented seats and heated steering wheel. I still need to pin wires into XY310A and XY331A. The wires have to be added to the "stationary" side of the connectors. These two, and a 3rd connector are attached to a black plastic U bracket. I can't figure out how to remove the connectors from the U bracket, or how to remove the U bracket from the truck so I can see how to remove the connectors. This bracket/connectors is located in the driver's firewall area, close to the A pillar. The picture is the best I can get. I'm also attaching a picture of the connectors on the donor harness for reference

Thanks, Brent