So I have a new question about the battery switch and hopefully everybody is still looking. The previous owner said he would just put the switch to 1 and it powered everything. From motor starter up to electronics. Is that normal? I thought the switch on one would be electronics and switch 2 would be for motor start up or vis versa. Then the all switch would make both work. Am I wrong about this? What does the red box with the 40 button on it do?
That is how my two batteries are wired. Like a lot of folks with two batteries, I typically run on 1 battery only. I alternate which battery it is, 1 or 2. Sometimes after a longish trip, I will switch to BOTH for the trip back home, That is done to top off both batteries.
The practice of using one battery only hopefully stops you from accidentally discharging both batteries as might be the case on a day to have loads running a long time with out the motor on. Stereo, livewell, plotter, spot light, nav lights etc all can drain a battery if used long enough. If you drain the battery you are using, you have the other to get you started and back home.
The red button is as mentioned a breaker and it is the main power source for your fuse and/ or breaker panels. Basically everything runs through it except your automatic bilge pump which is wired directly to a battery through an inline fuse near the battery connection.
The 208 is a small boat and doesn't normally have a lot of accessories and associated loads. I really don't see a great need to wire in an isolator and secondary charge circuit.