Yep, pretty sure that’s what you’ve got there. A quick google turned up a few more people who’ve attached them that way. Here’s one Jeep poster:
I had the Yakima version of these for years on my pickup shell. In my opinion, using these on the top would be crazy unsafe. The whole point of the adapter is to mimic the rain gutter where you now have downward force onto the adapter and gripping force of the tower onto the adapter.
I would never use these as applied and would advise either relocating or leave them there and install new ones. Here’s how they’re meant to work: