You are missing two and your other two are the wrong ones too… yup same issue! Check your Y axis too…under the machine, they missed those as well…sorry man!
I sent mine back and they fixed it up in less than a week. You need to take it all apart to access those on the X axis.
Yup! son of a gun! I don’t get it, very sorry…hopefully they fix it up right away for you. It was less than a week for me, they covered everything.