Will V60s/V60p hang-up cup work with the older hands free car kit boxes?

I want to buy the SYN0705 hang-up cup (V60s/V60p) and use it with the
professional hands free car kit that I installed for my 270C).

The Motorola web site is not useful, nor does customer support have a clue
(other than telling me the wrong hang-up cup for the V60s/V60p which is not
the same as the cup for the other V60 models). The Motorola web site has a
lot of mistakes, such as stating that the S9703 works with the V60p/V60s (it
doesn't, it's the wrong cup). These mistakes have been propagated to most of
the resellers that simply copy the text from the Motorola site.

Also, while researching all this, I created a little web page with a lot of
details on the hands free car kits. If anyone is knowledgable about this
subject, and can comment on any errors, I'd appreciate it, especially if
anyone knows the difference between the S9610 and the S9950 (the older and
newer base car kits sold without the hang-up cup).

http://nordicgroup.us/mphfck/