Option 1

This will allow the jack to fold up along the frame rail. Because it is a pipe mount it will probalby be a bit noisy off-road and I would more than likely remove it while driving on rough roads. I am aslo worried about trailer stability when it is not connected to the Jeep.
Option 2

Almost on the center line of the frame so it will be more stable while disconnected from the Jeep. It will not fold in this position and will have to be removed and stowed in either the Trailer or the Jeep.
I welcome your opinions and experiences.