Mount wiring harness in bumper hole?

I ordered one of the Tacoma-specific harnesses that can connect to the battery. Wondering why despite searching I'm not finding anything about making use of the covered hole in the bumper (to the left of the license plate) to mount the harness outlet ? Isn't that what what it's for? Just thinking a mounted outlet would be cleaner than having a coil of wire hanging under the bumper.

What am I missing here? If it's not for trailer wiring, what is it called?

 

What harness do you have?

Your bumper has the plug already or is just a blank?

 

Harness:

$78 Tekonsha T-One® T-Connector Harness, 4-Way Flat, Compatible with Select Toyota Tacoma

https://www.amazon.com/gp/aw/d/B01M8FEQPW/ref=ya_st_dp_summary?ie=UTF8&psc=1

Bumper doesn't seem to have a harness or any connections inside the hole judging from the view from under the truck. It's an SR, pretty basic. Haven't figured out how to get the cap off, doesn't just snap off easily. Didn't want to yank in case it's supposed to be permanent.

 

This is one of the better videos for walking you thru the rear bumper removal, you'll see how the top pad comes off here....

https://www.youtube.com/watch?v=xKhcomDLQmE

From your link, and with your SR, it looks like you'll need the OEM adapter/termination.

 

Bumper removal? Seriously? Maybe I don't want use the hole!

 

I don't think you'll have to, just the plastic top pad. I'm betting the metal substructure has the hole for the OEM plug.

 

Thanks. Do you happen to know what the part that would replace the hole cap is called? No luck with "bumper plug".

 

To answer my own question it's called a trailer plug. Nobody seems to sell an aftermarket version with a plug that mounts in the bumper hole. So I guess it will have to dangle.

 

Story of my life.