Just finished this job. Thanks for the tips and diagrams. I used the Posi-tap connectors as there were exactly four left over from a recent project. It looks like the current version of the cheap FicBox unit from Amazon (https://www.amazon.com/gp/product/B01HB5M5R2) has been updated, but all the wire colors line up perfectly with the diagram provided by ibjettin. One mistake I made was grabbing the first black/blue wire I found when I opened up the harness going to the rocker switches in the armrest. Took me a few moments for figure out why "lock" was not working. Turns out there are several black/blue wires in there, and you want to the one with the orange paint marks on it.
