Prewired for electric Jacks?

Lance campers that are pre-wired for jacks have the connector with a cover at each corner.

According the Lance brochure for 1995, the Lance squirelite did not have an option for electric jacks.

The brochures for most Lance campers are available from their site at www.lancecampers.com then click on "support" at the bottom of the page.

Edit:
If you wanted to add, you should be able to pull wires inside the camper for all three corners except the passenger rear. For that one, I would come out at the front passenger area and run the wire outside for the passenger rear jack in the corner of the wing.

Check with TC manufacturer?
I am pretty sure lot higher class TC are prewired, but even when they are you want to know where to look for the wire.
I think the jacks need at least 30 amp fuse, so you have to take it from main panel.