[smurfgirl]

You decide this with your alliance before the match begins- see bolded statement in <G09>, below:

<G09> TEAM Starting Positions – Prior to the MATCH, the COMMANDER and PILOTS from each TEAM are stationed behind the PLAYERS LINE, and facing their PLAYERS STATION. The PAYLOAD SPECIALIST is stationed in either of the FUELING STATIONS belonging to the ALLIANCE, or seated in the OUTPOST belonging to the ALLIANCE. The seat belt in each OUTPOST must be snugly fastened around the PAYLOAD SPECIALIST seated in this location. The determination of where the PAYLOAD SPECIALIST is stationed among these three possible locations is negotiated within the ALLIANCE before the start of the MATCH.

Edit: Sorry about responding to the wrong statement, I was trying to advise on your musing that

I assume that each PS (a.k.a. HP) from each team is limited to 20 minus the number of balls on THEIR 'bot. We probably cannot "donate" balls among Alliance players.