Will these all be able to connect?
Quattro 12/5000 Inverter/Charger
Victron MPPT 150/70 Tr
BMV-712 (Bank 1)
BMV-712 (Bank 2)
Color Control GX
There are enough connections for Quattro. MPPT and 1x BMV-712.
To have another BMV-712 you'll need to use a VE.Direct - USB dongle and then use the USB port on the back of the CCGX. However, please do bear in mind that only one battery monitor can be the master and provide the system's SOC. The other battery monitor will show up as a device in the device list and you will be able to see the data, but its data will not be used by the rest of the system.