I also had the IAG harness kit without the lights, it came with a Y harness, but I didn't want to have to get that wire all the way back to the floorboards and under the steering column.
So i tried it my way... seems to work great.
I recently ( 2 monthsago) purchased my 2025 Bronco Badlands. I was not impressed with the light situation.
I read 50 forums and google and Chat GPT etc... Everyone said can't tap the dome circuit it is controlled byt the BCM ....
I disregarded all of those forums.
I purchased some Nilight...