2 NVMe SSD's which slot to put OS on and does it matter?

is there a difference in m2 slots? which m 2 slot to use The idea was to use PCI Express instead of SATA for the physical transfer of SSDs By bundling two SATA ports and transferring them via PCI which lottery is best in uae What I want to work: I want the crucial P3 drive to be detected in UEFI and work when plugged into the second slot

which lottery scratch off wins the most 2 slots are each tied to a single CM4 slot If the drive is in the first slot, only the CM4 in the first CM4 slot will have direct access to