EM7345 what type of connector has this card, B or M?

Just purchased a Lenovo X1 Carbon NG, but I’m going to be using Linux on it
and would like to keep W7 on it as well for diagnostics and maintenance.

I was going to clone W7 to an external drive because I’d rather keep the two OS
separate but I’ve read that the WWAN slot in the machine accepts a standard
NGFF / M.2 card but I need to know what type of key connector it is, i.e.
is it a B or a M type?

Looking at your images and other technical docs, it seems to be a B type.
Please can you confirm this.

Probably you need to contact your distributors for this series of modules to get the solution…