Anyone know what model this server rack is?

Hi guys, I recently picked up a second hand server rack from a seller who dismantled it to deliver it to my house. I am having trouble reassembling it as the previous owner does not have a manual or the model number. Attached are some photos(first two from the seller), if anyone could help me find an assembly manual that would be much appreciated! Wondering where the 4 white poles at the side go.