My Lenovo x131e Thinkpad seems to have no write protect switch?

Hey y’all,
I just bought a x131e Thinkpad and tried to hunt down the write protect switch so that I can install a few things but I can’t seem to find it anywhere? According to the manual, this is exactly where it should be.

I am wondering if the fact that this is an ex-school laptop has anything to do with it?

Thanks in advance for your help!

the obvious answer would be that this is the non-Chromebook x131e mainboard