I need your eyes with this carrier!

Avy • Certified Doula. 28, tattooed, pierced, alternative model.Mommy of 2, wife to my amazing hubbybear. We have our third sunshine on the way!<3
Hey ladies, I need you help figuring this out. My mil got us this used carrier but there is no brand on it. I wasn't able to find it online to figure out how it works. Can I use your help?