I'm working on adding some stuff to the default custom map and I can't tell which command post belongs to which faction, how do i tell?

Look at the CPs in Zeroeditor, and look where it says "Team" and check if it's 1 or 2. Then look at the map scripts correlating with the level and you'll see where it says ATT = 1 IMP =2 and ATT = CIS DEF = REP, or something like that.