An aside: one-to-many breakout cables have a forward and backward variety, and care must be taken to avoid buying the wrong one. This link explains the difference, which is still applicable to SAS3: https://forums.unraid.net/topic/6723-sas-to-sata-cables-forward-or-reverse-which-where-why/

Note that some combinations of backwards breakout cables simply don’t exist, so there might be only one version available for sale. Still, read the product descriptions carefully for which end is meant for the HBA and which end goes to drives or the backplane.