Ronin Rare rack customisation

Does ronin rare rack support fitting of back rest from tvs on it.

As far as i know the back rest from ronin comes for round stock bar at the back and i am not sure if it fits on the company tvs rare rack.

If any one has info if it supports or not let me know so that i can see after market back rest which can fit ob rare rack.

Also if there are any workarounds for fitting tvs back rest on tvs rare rack please share imges Thansk