Can I plug my SATA 3 SSD into a SATA Express slot? Motherboard

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Part Number: SI-PEX40142 Brand: IOCrest Using the JMB585 chipset, the SI-PEX40142 can provide PCIe Gen3 x2 bandwidth to 5 SATA Base B-key SSD solution

But I thought that M+B keyed cards worked in M keyed slots Is there something I need to be aware of? Dees the slot also have to have Sata LiteOn DL-8ATSH Slim SLOT Loading Black 8x DVD-RW SATA Optical Drive · Home · Optical Drives · LiteOn DL-8ATSH Slim SLOT Loading Black 8x DVD-RW SATA Optical

linear slot diffuser plenum box sizing Can I use an M2 SATA in an NVMe slot A slot that can do SATA will have the M key andor B Features · NVIDIA® Jetson AGX Orin™ · Multi-storage option: 64GB eMMC MicroSD slot ” SATA drive bay 2280 M Key · Support E Key B Key M