Ground behind front right bumper for wiring harness...how to remove it? It has several barrel-crimped wires connected to it, but seemingly without removable connectors. The wires spin with the bolt. There are two tabs on the side but I can't make sense of them.

I can rebuild an engine but these little connector type stuff throw me for a loop!

 

Ok so it turns out the other side just unbolts off. Guessing these wires are painted together. All good!