Cyrix Li Ct for starter battery trickle charging via MPPT SmartSolar charged LiFePO4 leisure battery

I previously purchased Victron Cyrix LiCt to charge the LiFePO4 house battery via alternator, but am now considering using Orion XS instead…

My question is whether I could still use Cyrix in order to provide charging to the starter battery via solar charged LiFePO4 house battery only while the vehicle is not used for longer time periods?

I was thinking of instaling a switch between house -cyrix - starter battery and turn it on only while the vehicle is not running.
The Orion would be used for charging via alternator while engine running.

Electrical components:
LiFeaPO4 200aH + BMS123 system
Lead acid 100aH starter
Orion XS (cyrix Li Ct?)
Victron Mppt 100/20
445w solar panel
Vitron Phoenix charger
Victron 275W inverter

P.s. i understand that the MPPT should be 100/50 insted