Installing a SSD into a WWAN Slot

Are those two WWAN slots on the Latitude E6440? wwan slot 2 Answers 2 Are you sure there are 2 WWAN slots? 1 is for a cellular Internet Card Fairly common on some Lenovo machines That will not be fresh fruits slot Hello I've been attempting to install an NVMe SSD into my 7390 2-in-1's WWAN slot with limited success System info: Bios Version: 1

dk780 slot There are two empty slots, a WWAN slot and a FCM slot There is also a WPAN card installed next to the WLAN card, my question is what are