In preparation of changing my transmission and xfer case fluids (everything is on order) I attempted to remove my skid pate. While doing so I had 2 bolts (middle on each side) just spin. The remaining 4 come out just fine but I don't know how to get those middle 2 off. I'm not too concerned about getting them back in as I don't offroad much and I think the remaining 4 should hold it. Any suggestions?