Very very nice....Getting all the electronics in one easy to reach spot.....perfect.
As far as cables go..... solder on copper ends are the catsass....and they will not leave you scratching your butt when corrosion sets in where you can't see it.
I have fought bad cables many times and crimped joints are a no no on anything mission critical...
Get the copper solder on ends... slip a short length of heat shrink tubing over the cable.
Put the copper end in the vice and add a bit of soldering paste to the cup and work it around.
Strip the cable insulation back and insert into cup.
Heat the assembly with a propane torch and add solder and allow to flow into the wire/cup until the cable has saturated and the solder is at the top lip of the cup.
Let cool.... DO NOT USE ACID CORE OR SILVER.
Use a good lead rosin core solder and life is good.
Slip the heat shrink tube over the cup end of the assembly and wave the torch across it just heating enough to shrink it to form a nice tight fit over the cable and copper end.
This cable will never leave you stranded with a corroded crimp buried where you can't see it.
Crimps are a ticking time bomb on the heavy battery cables.
I have had to deal with this crap in the cold....no fun.
A soldered connection is 100%
The crimps will always start to oxidize in the area the metal is crushed together.
The inner strands eventually loose contact and the entire assembly fails.
Soldering forms a 100% reliable connection....and you can get your custom fit just perfect.
Lay it all up...mark things...solder...good to go
Try and get as fine of stranded wire as possible.
USE the Marine type battery terminals with the stud and wing nut.. Connect the copper terminals to the studs... Always carry a couple spares in the tool box..
If a battery terminal fails...simply toss it in the dirt and put in a new one... Light coating of white grease on the terminals helps to stop corossion is a plus.
A Glass mat battery like the Optima is a real plus too....they don't eat up battery trays and terminals....also they can be had with top terminals as well as side terminals
Any battery with access covers on top of the cells is a liability and will contribute to failure you don't need/want CORROSION ACID LEAKAGE
Welding cables are the ticket... fine strand...
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Hope this helps.