Hey. On a 1966 Mustang convertible, there are 5 nuts holding on the trim that looks like an italicized "E" right behind the doors. The nuts are behind the rear window cassettes. Does anyone know if the rear window cassettes (or guides if ya wanna call them that) have to come out in order to get to the nuts? Also, recent bodywork has been done to the Mustang and the two elongated holes on the bottom of the cassettes are not bolted to anything... are they supposed to be? There are screw holes in the body underneath it. Any help would be great. Peace out.