Installing Proxmox on Zimacube and virtualizing TrueNAS Scale

Has anyone come up with this idea earlier? I really like Proxmox for the virtualization part and TrueNAS Scale for the storage solution. Best of both worlds. However, I understand that installing a HBA in the PCI express slot is recommended to passthrough the 6x discs in proxmox to the TrueNAS scale VM. This tends to be a little bit difficult given the PCB in the back of the bay which connects all the drives to the motherboard. A solution could be to remove this PCB and install SAS splitters from the RAID HBA card to the drives, but next challenge is how to power them? Is there anyone with maybe the same idea or point me in the right direction on how I could approach this? Thanks.

You can just passthrough the SATA controller.

Life can be so simple sometimes… Thanks, cannot believe it did not occur to me. Installed Proxmox, then created TrueNAS Scale VM with passed through SATA controller, worked perfectly. Many thanks!