My truck came with quads, and when I installed the factory projectors, I opted to use the factory projector harness instead of the retroshop adapters as they were the same price at the time. It’s a bit of a pain to install because it contains the connectors for the fog light jumper harness, hood latch sensor, washer pump, washer level, headlights, a/c, and something else I can’t think of. The projectors function but the only problem is, the big mating connector that you plug that harness into under the PDC is missing wiring that goes to the BCM. That’s on my list of projects to complete right now.
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https://www.ramforum.com/threads/alfaobd.123982/page-344#post-1893955