Attaching a mount for the big round plug

The four wire plug will not activate your trailer brakes. You need another wire and brake controller.

 

You might want to use something like this: https://www.etrailer.com/Wiring/etrailer/C57672.html
A full kit which will allow for additional connections, brake, charge wire, etc without having to replace it in the future.

 

I have a hitch like yours with little room for the plug (like SteveP posted) I simply zip tied it to the loop where the chains attach. Isnt perfect but worked all summer

 

For our minivan, I ran the wires inside with a loom that would sit inside the jack box and pull out the rear door to plug into my trailers. Anyway you could work something like that out? Have it stored in the back and roll out when needed? Keeps it from grounding out, scraping or other damage via road exposure? Thinking out loud here...

 

I Have something very similar, but mine has 5 way flat on the bottom . the bracket is exactly the one you have, I have used this set up for years with no problem.

 

I wouldn't even use a bracket. Either leave the harness loose in the rear interior and run it thru the lid weatherstrip when needed ..... or leave it loose under the car and just stick it in the receiver when not in use.

 

I would weld an ear on the hitch to bolt that metal bracket to.

 

I used a "Tow Ready" 118156 6 and 7-Way Connector Mounting Box from Amazon. Installed it with a band clamp to my after market tow hitch cross-member. Not ideal, but is working OK.

 

Same situation as me and my light Alainer. I have the fancy 7-pin OEM harness, stored in my attic - I don't have a pressing need to install it on my Jeep.

 

This what I use on my Subaru Forster.
mounted to the lower edge of the bumper.

and this is the trailer end. I made up a short extension with a 7 pin RV socket to plug into the trailer.

If you are interested I can take photos ......... but it is very cold outside right now.

 

here is a photo of the "Tow Ready" mount on my after-market CURT tow hitch

 

I used this bracket from etrailer. It works great along with the angled bracket that came with the 7-way plug.

https://www.etrailer.com/Accessories-and-Parts/Tow-Ready/18136.html

 

I like that bracket....I think I'll make my own this winter.