Truck camper jack bracket advice requested

[rotavap]

Good morning! I picked up a set of 3 truck camper jacks with the idea of using them to lift and temporarily hold my truck cap/topper when I want to use my truck to load dirt/brush/rocks/etc. I have a few ideas for how I can attach a small length of pipe that the pins on these stands can fit in to boards that span across the truck, under the topper to lift it and drive out. I cannot find what the original brackets look like that these jacks were originally intended for. If anyone has pics, knows the brand (stand design mostly looks like a Reico), or has any ideas for a safe design for my intended purpose that doesn’t require a welder I would appreciate your input!
Thank you.

 

[rotavap]

In haste to get some yard work done, I made a first prototype with stuff I had on hand. Works pretty slick and don’t have to make and store the giant sawhorses some people make. This should come apart to store easily in overhead storage. Biggest headache is only having 3 jacks… 4 would make it much more stable as well as having to shim them because my driveway is sloped!

 

[The Cobbler]

nice!
I think the idea of 3 rather than 4 is one person can jack up or down and not cause the 4th leg to be "floating" 3 legs will stay firmer on the ground