I Fixed It! Thanks!
OK. I got the grill cloth off. I removed the screws holding the woofer in place and was able to reach behind it and move the threaded insert back into place.
That was NO fun .
These stands which I am trying to connect to my speakers are the JBL stands that go with them. The stands are very hard to find,but I was lucky and found them online.
Just to let everybody know: If you have JBL N26 speakers and you want to attach them to the JBL stands, FSN26, be careful when you screw the top of the stand into the bottom of the speaker. The screw insert on the speaker bottom could dislodge and slip up into the speaker. Then you would find yourself in my predicament.
Thanks again.
I knew I could count on the Forum to solve another problem.