Wiring help for sequential turn signal running board LED

2014 Toyota Tacoma Prerunner sr5 2wd 4cyl

Does anyone know which wires I can splice into for running board lights? There are three connections: sequential turn signal, running lights, and dome light. I want to connect them inside the cab just inside the door under the dash, which I already ran the cable into the cable through the grommet under the seat. Thanks!

these are the connectors I want to splice the wires into if someone could point out with harness I can put my test light on each pin or something

 

I tried to decipher the schematics in the following link, but I really don't know how to read the mumbo jumbo. If anyone can help determine which bundle or harness I can tap into for the lights or how to read the schematic, I would be very appreciative.

https://www.tacomaworld.com/threads/2015-wiring.559639/#post-18289852

 

Stupid question but why cat you just tap all the wires into your trailer hitch wiring? Just get a Y 7 pin connector pigtail and wire in the running board light strips into it? All the wiring can be contained outside the vehicle without getting crazy running wires.

 

I'm in the same boat as him. He can't use the 7 pin connector pigtail because he also needs to tap the Door Assist wire and the Parking Lights wire.