Wuz just about to answer your earlier query about that!  You use a mating socket in the Tx or junction box to provide the locking power.  The manual has the directions.

73,

Mike

How in blazes do you get there critters apart?

I figure there’s a screw under the rotating collar,  but I’ve not been successful in getting the collar off.   I didn’t find anything in the manual…. Here’s a photo of two of the connectors….

Thanks. 

Mark K3MSB