seeing that you have a trailer and not a motorhome I don't think you can install automatic leveling jacks. On a motorhome you can because you lift the truck frame till it is level.
On a trailer the four corner jacks are only to steady the trailer; not adjust it to be level.
First you park with the trailer level side to side and then you raise or lower the front of the trailer with the front jack till it is level front to back. Once this is done you lower the four corner jacks till they just get snug.
I use a battery powered hand drill to screw mine into position.
Al and Jean