Trickle charging vehicle main battery

I have a small Victon system in my Land Rover Defender 110. It consists of a Orion XS 12 12 50 DC/DC Charger, MTTP 100-30 Solar Controller, Lynx Distributor 1000 DC a Smart Shunt and two 68 amp hour Odyssey AGM batteries, main and auxilury.

My question is, is there a Victron product that I could add to the system that would take surplus solar power, once the auxilury battery was in ‘Float’ mode, to trickle charge the Vehicle main battery.

A simple version is to equip the batteries and the Orion with Anderson 50A connectors. So you can use the Orion reverse