To keep the 7 pin plug from getting dragged around in the dirt and also to
keep the spiders from building nest in it, I bought a plug saver at Wal-Mart
and installed on the right side of the tongue of the popup. In my case if I had installed it on
the left side it would have interfered with tongue jack dolly wheel rotating out of the way.
Here is a picture of the installation.

I also installed a 30 amp RV plug (lower left and center) to hookup
too while parked in the driveway.
I have it on a dedicated 30 amp breaker line from the switch box
using 10/2 with ground (orange wire lower right).
The bottom breaker and the orange line coming out of the box is the
dedicated line.