Re: 45 amp converter install
As a retired tech, I would have no problem in changing out a converter, but they may not be connected the same way. You need to label each lead as you remove it as to where it was connected. Keep in mind that where does not mean the physical location but rather what that connection was. The 12V output and the -12V return must be correct. It may have a hard wired 120V supply or it might have a plug into an outlet. Some converters have a separate connection to the battery and some have one common connection to both the batteries and the 12V loads.
On batteries, the 6V golf cart batteries connected in series pairs will supply significantly more power and live longer than do the more common 12V, deep cycle batteries. But they also cost more so if you do very little dry camping, it may not be worth the extra cost.