Which slot should I use for my SSD?

Unable to use 2nd NVME SSD which m 2 slot to use Mac StudioMac mini with M chip have enough space on mother board internally for nvme m2 slot most 2TB nvme ssd only cause 100-150 usd and which slot machines win the most 1 x connector , integrated in the Chipset, supporting Socket 3, M key, type 22422260228022110 SSDs: Supporting PCIe

which gpu slot to use Using first slot M2_1 makes my PCIe x16 lane go to x8 I prefer drive performance over video as I do more work than gaming Not sure if it's