this tab your talking about i see the port just no tab do i force sm screw driver toward the chrome lock cover i see the layout on the lock cylinder on the threads page i just dont se the tab im bout 1/2 blind LOL but w/ glasses and magnifier and very good light i just dont see the tab to "push" down to release the lock cyl thanks guys for all your support on this BY THE WAY I DONT HAVE THE KEY I HAVE ONE THAT FITS IN NICE BUT WONT ROTATE IT I HAVE 3 OF THESE IM TRYING TO GET APART