Inside my coach (by the front door), there is only one disconnect switch for the house batteries. To my knowledge, there is no disconnect switch for the chassis batteries. Coincidentally, I just replaced the six house batteries on Saturday - first time since I bought the rig. I'm the original owner. Your rig should have Trojan 105-T batteries. I suggest not buying cheaper ones as Trojan is the best (obviously).
2008 National Pacifica PC40E