Orion TR Smart non Isolated with Smart Shunt

[Benki]

Hello,
I am completely new in the Victron world and have two questions.

I have created a rough circuit diagram for the use of an Orion TR Smart with a Smart Shunt. Is this possible?

What size did I need for the Smart Shunt if I use this as a battery monitor? 300A, 500A or even more?

My battery has 12V 100ah

The pink rectangle in the ground line is supposed to be the smart shunt.

The two red lines are the AUX connection to VBat

[chrigu]

Schematic looks correct

The shunt size is determined by the loads you expect on your system. 300A at 12v are about 3600W, i expect your 100Ah battery to already struggle with that, so i guess 300A is enough