The Macbooks (Air and Pro) use a proprietary connector for their SSDs. It looks like M.2 but it's not. In addition, Apple has tweaked the port at least once to try to thwart OWC's aftermarket SSDs - Apple began encrypting the datastream between the mainboard and drive. That's why the above linked adapters only works for 2012 Macbooks or earlier.
As yours is a 2015 model, I don't think there's any adapter which will let you use your Macbook SSD plugged into a regular SATA or PCIe port. AFAIK, OWC is the only company that has managed to crack Apple's encryption. You can try contacting them to see if they have something which will work.
https://eshop.macsales.com/shop/ssd/owc