OK, The button just right of the mic jack is a red diamond, similar to the EMERGENCY button on Tyco - MA/Com - Ericsson radios... THIS is the "MON" button on the GTX, but NOT the LCS2000.
One suggestion I got was that it is the "music note" button that toggles PL, but I found out the correct button is the one that looks like a "double-hung window" - or maybe the capital letters "P" and "L" superimposed upon each other. (Or something like that anyway...) It's located on the far lower right of the panel, below the huge up and down arrow buttons, which do nothing in conventional mode. (Just like the GTX.) Once I figured that out, after connecting Pins 7 and 14 on the accessory jack, the button toggles the PL on and off. But once you press that button, you also have to press a Channel button (ether up or down) again to go back to a "normal" display. And, of course, you need different RSS to program them... even though they are close to being a GTX. Close, but no cigar. ;-) Thanks all!! Mark - N9WYS

