Here you go Ian - The fact the model number has RTS in it means it uses Somfy’s RTS tech - and there fore you’ll need an RTS hub or bridge. Both the Connection and Tahoma should both be able to do RTS.
Read this thread - it should have what you need. Somfy Window Shades & SmartThings Integration Guide for the year 2020! (ZRTSI)
That said I prefer straight up Zwave Somfys (Somfy motors go in Springs Window Fashion Blinds, which are also marketed as Graber and Bali) I got all mine from Zebrablinds: https://www.zebrablinds.com/smart-homes