Subframe connectors question

I think you want the weight of the car to be on the ground leveled on all 4 corners not hanging in the air.
It's funny because I just installed Moroso sub-frame connectors and the directions specifically say to put the car up by the frame and let the rear axle dangle.
I did not do that. I feel like I would have panel issues once I let it down. I had the car up by the wheels and installed them. It worked out good. Doors didnt change how they open or close.