How do respawn zones work in Halo 5's forge?

I’m working on a forge map in Halo 5, and I want to use respawn zones in order to prevent players for respawning too close to the enemy team’s players, and, in CTF, the enemy base. I would think it would be simple, but there is a value that I would assume determines the strength of the team’s probability to spawn there, but there is no indication of what a higher or lower number means. Also, is the team that I set the respawn zone to be controlled by more likely or less likely to respawn there?