Splitting 2AWG to 2x 4AWG w/ protection

So I currently have a (failed) Renogy 60A DC-DC in my RV, that I'm replacing with a pair of the new Victron Orion XS 50A DC-DC chargers. The current Renogy is fed by 2AWG from my truck. The Victrons will only take in a max wire size of 4AWG. What's the best way or splitting the 2AWG into a pair of 4AWG, and protecting the wires as well? By best I mean most cost and space efficient, as well as safe of course. Space is a concern because all of the equipment is mounted under the bed in our trailer, so there's not a lot of extra room available. I've found some 1-in 3-out MRBF fuse blocks from BlueSea, and a 1-in 2-out MANL fuse block from T-Spec, but I have everything else protected by breakers and I really prefer consistency, not to mention I hate having to carry even more spare fuses. I've been unable to find any 1-in 2-out DC breaker setups.

Thoughts?

Current setup:


MRBF fuse block mentioned above:


T-Spec MANL fuse block:

How long have you been using that MPII laying on its back?

Have you had high temp shut down from lack of proper cooling in that small enclosure with the fans on their side?

740GLE said:

How long have you been using that MPII laying on its back?

Have you had high temp shut down from lack of proper cooling in that small enclosure with the fans on their side?

Click to expand...

It's been like that for about a year and a half. It's on a platform raised up 1.5" from the floor so that the openings have some room to breathe. The fan that you can just see behind the MPPT is controlled by a Cerbo relay and turns on if the MPII fan is on (and/or if the MPPT is on, or any of the temp sensors in the compartment hit thresholds I've set). It's positioned high in the compartment and at the end that all of the devices (including the MPII release heat. There's an intake grille in the bottom right of the compartment that allows cool air from the living space in, and by careful layout of the devices that air goes past the MPII's intake before it goes anywhere else.

I run the AC off the system while towing (so high power draw and lots of heat) and haven't had a single heat issue.