harness rewire help

[michael bustamante]

ok so im following LT1 swaps you tube videos and I have the exact same harness (2003 Yukon XL dbw)
ive looked and looked but theres a couple questions still.
first; #33 on the blue plug. the purple TCC wire. where does hook up to?
and B; he shows 3 orange wires hooked up to the battery. 20 and 57 on the blue plug but he also shows a third orange wire I think he has it labeled "OBD2".
Where is this wire? which pin is it?
hopefully you guys can help me out. I wrote Jacob but im sure he`s swamped with e mails all day every day