Charging cable????

Take a clean sheet or paper and a photo of the battery box and the area and design an exterior lug mount and routing. Measure and then find parts store or truck service that will make you a couple of batter cables with crimped on water proof lugs, Might take a bit of a search for the idea items but Tow Truck Drivers and Off Roaders use to make battery cables that ends extended through the grill an inch or so to jump off others or be jumped off, or supply power to electrical items when they camped out. look on line for what is currently available for battery cable ends and rubber covers if you want and design a first class puppy.

Thanks to everyone again. I found one that I can use after all the suggestions. Didn't realize it was that simple??
As usual I came to the right place for the answers, thanks again.

They make many.. There is the FLAT 2 Connector (Any Auto Store) LIke the flat 4 trailer connector but only two polarized pins.

I use a whole bunch of Anderson Power Poles (westmountainradio.com if I am not mistaken as well as hundres of other dealers my last pack was from gigaparts.com)

These are crimped onto 10Ga or smaller wire and let me move radios from ride to ride.. and so on They are Asexual and polarized an be configured as any number of contacts.

There are many other 2-connector options as well

I thingk garym114 is on the right track. If the box has room for it maybe one like this. I added one to our previous 5er to power a maceator pump


Attwood trolling motor connector

A cable can be easily made with ring terminals on the battery and some push connects to match the charger.

Something like this, for a trolling motor battery

https://www.homedepot.com/p/Attwood-Trolling-Motor-Quick-Connect-14367-6/308145257

They make battery chargers where the cables unhook and stay with the battery. I have one on my ATV, makes it easy to hook up when I park it for a while. This is just a random link, but I would think anything similar:

https://www.amazon.com/dp/B07VFFBRNP/ref=cm_sw_em_r_mt_dp_U_tglyDbEV82KFA

2 conductor brake cable would be a good choice.