M.2 M-Key PCIe 5.0 x4 Slots
Two M.2 M-key slots are located at M.2-C1 and M.2-C2 on the X14DBI-T motherboard. The M.2 M-key slots on the motherboard support PCIe 5.0 x4 devices in a 2280/22110 form factor.
For a detailed diagram of the X14DBI-T motherboard, see the layout under Motherboard Quick Reference.