It has a slot at the end that looks like something may be inserted, but it does not look to be a micro SD card reader as it has no way to plug into a PC. It came in an individual shielded bag in the motherboard's box.
The motherboard's manual can be found here: https://download.msi.com/archive/mnu_exe/mb/MPGZ790CARBONWIFI.pdf It makes no mention of this part or it's use. I thought it might be used for intrusion alarms, but this doesn't seem to even work for that.
Can someone tell me what this part is and what it is intended to be used for? It does not seem to be required for normal use of the motherboard. Thank you.

