RESOLVED: New to me wiring fault

Hi, I have a Leer 100xq installed by the PO, along with a 3-outlet power output (Leer?) connected to a TAG distribution block. (Off the top of my head I think it's 6-pole in, two 4-pole out, or something like that)

The snag I have is the LED canopy light doesn't turn on/switch doesn't work/not sure if power is getting there. I'm finding 12VDC (13.xVDC) from the harness going into the block. The 3 outlets output roughly 13V each (left top plug). The right side plug of the block goes to the interior light and top brake light. Brake light functions, but is not constantly running. if I switch the plugs the brake light is constantly on so there's clearly power (fuses look whole/seem to work?) going to both top outgoing plugs. maybe it's wired wrong/I don't know. Is there something that is simply done wrong/easy to check/typical failure point? Thanks!

 

Followup; the main harness into the Leer fuse box had some pins that were pushed too far back. Check for these pins in the larger harness to ensure positive contact.