Will a M+B key 8x Sata card work in a M key socket?

what does a m 2 slot look like   Dan what are tonights lottery numbers

2 is a slot that can interface with SATA , PCI Express

2 is the interface with which SSDs are connected to the motherboard and was first introduced in 2012 for SATA or mSATA The interface connected data Unlike the SSD wherein the storage media is inside a casing, SSDs are bare circuit boards that look like RAM, however, with varying

fsdss-508 2 slots are M-key, but some are B+M-key, and some are E-key  There are two types of SSDs: SATA and NVMe SATA uses an older interface with one designed around hard drives while NVMe is designed for flash memory