Help With Payload Gamemode

I'm new to hammer and I'm trying to figure out how to switch team spawns when a point it capped. Any tips or links would help!

 

This is one way to do it. When the cart passes over one of the track entities have it output and disable the spawnroom entities and enable the new ones.

 

Or add I/O for the actual point entity. Which works in any point based game mode. There are outputs for when each team captures the point. Those fire even if a game mode such as payload arbitrarily changes ownership of the point.