From the OEM 3rd brake light harness i fed the wire/tubing out of the BOTTOM left grommet of the door when the door is open. In this pic here, above my hand you have better access for the fish, however i fed regular 14/2 house wire and used it as a fish through that corner and out that same bottom left grommet. I used electrical tape to hold them together I then pulled out the 14/2 to bring this tubing to where i have that spade connector. Check out my post under r/hondafit on subreddit.