I finally got the correct terminals and was able to get everything up and running like factory thanks to all of the valuable contributions from everyone on this forum.
I ended up creating a factory style harness to bring two additional wires to each headlight...one for fault sensing and one for the second parking light connection for signature lighting. I piggybacked onto the main harness and, rather than making adapters, I unpinned the 12 pin connectors and pinned the new 16 pin connectors.
The fault sensing wires were already terminated from the BCM and dead ended at plug XY310A. I picked them up in that plug. Then, I ran the signature light wires to the appropriate locations on the BCM. I ended up using JScan to change all of the settings. The proper terminals for the BCM were an absolute motherf***er to find.
Thanks in particular to
@Jimmy07 . You sir, are a wealth of knowledge when it comes to these trucks.