Hitch Extension Questions for Pulling a 7 x 14 Cargo Trailer

I moved my tongue jack back.
Remember how you adjusted how far back on a seesaw you sat as a kid to put more or less weight on your side? That’s exactly what’s going on with those hitch extensions.

I’ve driven tow trucks. You can extend and retract the wheel lift holding the car as you drive.
When you do that, the difference is dramatic. You always want it as tight to the back of the truck as possible.

Same with a trailer unless it’s a really light one.