I am trying to remove my tail light panel and tail light housings for installation of a new gas tank. The 6 studs and nuts above and below each light housing where the flange is just spin. The stud spins with the nut, but the stud is not coming free from the screw hole. Some spin freely, some spin with some torque, but none come out no matter how much I spin them. Is there a diagram around somewhere which breaks down the parts so I can better understand the set up and therefore solve the problem? Thanks. ps. the 4 or 6 studs and nuts that are attached to the rear of the light housing do the same spin. Also, there is really no room to hold the stud with pliers while I spin the nut off.