Hi, my name is Jürgen and i'm new here since i've got a pair of old JBL 4310 monitors. They are driven by 2112, 2105 and LE20-1 so the later version.
Cases have dents, scratches and are crudly made. You can cee nailholes and poor paint application. One of the tweeters ist damadged, it has only 1,2Ohm.
First the glued bezels from the bottom edge and the tweeter must be removed to reach the screws among them. I've used some heat and a sharp knife.