You won't have a problem, just tap the one that you're already using.

(I still need to re-do the S2000.org site, thanks for the reminder... stupid work, keepin me busy, hehe)
-Doug

 

Yep. That tap is good for ~25A if I remember, unless you're running a leaf blower in there you should be OK. Tap them both off the same connection.

You can stuff the wire up under the trim like Elistan suggests... I was a little anal with the install when I did the writeup.