[jclark003]

Pull 12v from the breaker panel at the base of the helm. Tiara usually leaves an "aux" or unused breaker for such a purpose. If not it's usually ok to share a breaker as long as the total load doesn't exceed the breaker capacity. Make sure you pull from the breaker side and not the hot side (hot usually has a common red feed wire across multiple breakers). There should be a ground bus bar back there as well.

If you need to pull a circuit from the battery bank make sure it is fused and pull it from the house disconnect switch, not directly from the battery bank.

Good luck