I installed a 7 pin receptacle to my TV but wanted to be able to also pull a trailer with a 4 pin plug. So I wired a 4 pin trailer pigtail to the back of the new 7 pin unit and than plugged the existing 4 pin into it. Then tucked the extra length of wire behind the bumper.
Now if I want to use the 4 pin I simply unplug it from the 7 pin receptacle and use it as originally intended.
I installed a 7 pin receptacle to my TV but wanted to be able to also pull a trailer with a 4 pin plug. So I wired a 4 pin trailer pigtail to the back of the new 7 pin unit and than plugged the existing 4 pin into it. Then tucked the extra length of wire behind the bumper.
Now if I want to use the 4 pin I simply unplug it from the 7 pin receptacle and use it as originally intended.
This is the one I installed on my Honda Odyssey LX. It looks like what you wired up yourself Bud, but I bought it at Camping World right off the shelf.