I think these are slimline SAS 8x SFF-8654, I’m looking to add a few U.2 Drives. Would these be the correct cables?
They are pcie 4.0 x8 slimline sas connectors according to the documentation. Supermicro has all of their manuals easily available on their website.
The motherboard side is correct (I’m not familiar enough with U.2 drives).
JNVME 0 and 1
This look like the X12SPM-LN4F, so this FAQ should apply :
https://www.supermicro.org.cn/support/faqs/faq.cfm?faq=34848
JNVME0/1 are PCIe 4.0 x8 Slimline SAS Connectors. These two Slimline SAS connectors located on the motherboard to support two PCIe 4.0 x4 NVMe connections. This connector provides high-speed and low-latency connections directly from the CPU to NVMe Solid State (SSD) drives. Cables available from SMCI eStore: https://store.supermicro.com/catalogsearch/result/?q=slimline sas