Randy whenever I ran the coax for the six subwoofer locations in our room I ran a separate run of coax from the component wall plate out to each subwoofer location and terminated the wall plates with female F connectors and then had a local A/V store make me some cables that were terminated with male F connectors on one end and male RCA connectors on the other.
I opted to go with individual runs of coax for each subwoofer location because it kept the in-wall connections down to a minimum in the event that a connection or a cable somehow goes bad in the future and thus saving my old ass from trying to trace a bad connection that only god knows where it may be. With individual runs you'll know exactly where to look in case a connection decides to turn south on you. Whenever I built our room, I bought a 1000' spool of quad shielded RG6 coax through the same A/V store and although I can't remember the exact cost I do remember that it didn't break the bank.
Here's the cables I had made up from the same spool...
And an individual wall plate...
