Frame Connector Question

Yes, remove it.

It also helps to stitch weld the seam starting the weld on the thicker subframe connector and then carry the weld puddle up to the floor sheet metal.

Another thing that I learned by the time I installed my second set is to grind and shape the connector as close as you can get it to the floor and then use a bottle jack to keep it held up in place with most of the car's weight car remaining sitting on its tires. I used a big rubber mallet to close the gaps between the subframe connector and the floor sheet metal even more once the whole thing was spot welded in place.

Exactly. The USCT connectors require a ton of welding. The better you get the fit the better the whole process will go. Also, you’ll want to wire wheel everything, the cleaner the floor is near the welds the easier it will be.

I like how they look, but I wouldn’t use them again unless the car was going on a rotisserie for the welding. Doing the welds with the car up on jack stands wasn’t worth it. I’d use tubular connectors like I did on my Duster. They work just as well and are significantly easier to install.