Updating a never before used Orbi Satalite RBS40 impossible?

Ok, so here's a TL;DR version.

I've just come home from University and I've been using the RBR40 for a year. My room is only small so I never thought about using the satalite till I was about to return home and I assume the Satalite is on a VERY low firmware and the main router is on the latest. How do I update it?

Now the long version.

The router has been used nonstop for about a year and everything was going great. My plan was to use this router and satalite to boost the wifi in our house at home because it's very bad. ANYWAY, The router itself updates and I assume its on the latest one but the satalite has never been used before so I assume it's on the lowest firmware but I'm not 100%.

Anyway, My plan is to start using it over the router I was provided by my ISP but I can not connect to the satelite as it needs to be updated. Only problem is that the router config page, lists the satelite when connected via ethernet to the main router but it doesn't list the firmware version and the satelite doesnt appear on the manual update page either.

I assumed if I just plugged the satelite into my computer via ethernet I could access some sort of settings but that seems to be impossible.

Does anyone know of a way to update a satelite that can't be updated via the orbi access page?

Thank you.