Upgrading dc panel on the 1977 airstream, need some help

[jamesw]

So I am t ting to figure out my wiring plan as I upgrade panels.

Pictures for reference.
Original panels



1977 manual diagram that shows setup for 2 batteries I've marked out the spots for battery 1 as my panel only uses battery 2 positions.


Parallax 12 position panel


Wiring plan so far. Updating in a minute.

[jamesw]

Couldn't get post to update again so here is my wiring plan and questions.
So the left most panel is all tow vehicle wiring a b c d and will be wired into x y z aa using inline fuses. That seems straight forward.

E is the power on light that was my boy for the university vol so that will be discarded.

The middle school panel f g h I k and any new lines I need will be wired into the terminals on the new panel. Again fairly straightforward.

Now getting to where I start to have some uncertainty the right side of the panel.

M battery positive will go to 1 of the 3 big dc Inputs on the new panel. Does this need an inline fuse between the battery and panel? If so how do I replicate the connection with s ( jack/hoist) and t (main 22 v charge)which have their own 20 and 30 amp boxes/fuse? Does T go to the dc input terminal?

All the white ground wires under U will be wired to the ground bus terminals on the new panel. Negative battery and converter lines and whatever tow and dc output negatives I may have

Positive converter line goes into large dc input terminal. Do I use an in line fuse on it as well?

Finally, I think, what about the ammeter lines? Now I'm using the original control panel but am replacing it with a seelevel tank monitor system model 709-ph. Do I need these ammeter lines or not? If not does the monitor measure the battery voltage through its dc power line coming from a new line on the parallax panel?

Any help would be greatly appreciated. Thanks in advance.