9xr pro + xjt + xm+ receiver firmware update

[Vikac]

Hi everyone,

My name is Victor and i am new on this forum. 2 years ago i bought a 9xr pro and a xjt module. Used with x8r and v8fr-ii receiver. they both works great. Now i got an xm+ and would like to get RSSI from it to my Kakute F4 v2 board for OSD.
I started with firmware updates for 9xr pro (ersky9x, latest version) and xjt module ( EU, latest version). Next will be the receiver but I donk know how to connect it to xjt. I have seen people wiring up to the module or taranis. I believe ive seen a dialog about xjt module pin outputs too but I cant find now anything as a guide. Is it even possible? Any other option to flash xm+ firmware? The only reason why I want to flash is because i am not sure is it EU version with RSSI. Dont know how to check ether. Bougt on aliexpress i think. I can confirm that it is EU version because i did bind it to the module.
In Betafligh as i read it shold be automatically on ch 16 which is AUX 12 in the program.

Maybe is can help too.
I didnt set anything on 9xr pro. I dont know anything about RSSI.

Thank you so much for answers. Sorry if it is a newby question...

Regards,
Victor