reverse polarity switches?

["smiley pie" <scirocco82@hotmail.com>]

Heya freaks,
I was gonna hook up my keyless entry tomorow, but I am confused. The 
electrical-push-pull-thingie (highly technical term) has only two 
wires and you reverse the poloarity to lock and unlock. I am hooking 
it up to my alarm but want to put a switch in to do from inside also 
(I don't want to use the lock pull) What kind of cars use this kinda 
of switch? I can't seem to locate one from all my catalogs. 
c-ya, dave gray
oh yeah thanks

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