Oh, you're missing the cross slide screw entirely, that's probably a bigger problem.
The big hole, with 2 hex drive cap screw heads slightly below, in the red plate next to the plug. There should be a screw handle there, and a screw, which connects to the tool holder and moves the tool across the lathe bed (cross slide).
http://www.technologystudent.com/equip1/cenlathe1a.gif
https://shop.harborfreight.com/media...mage_11832.jpg
[edit]I had highlighted the things I thought were priority to start turning, but then noticed the cross slide issue. Problem is, the screw must match the nut attached to the topslide. Without knowing if it's an exact match of existing machines, there'd be some risk of needing all those parts.
And perhaps the bigger question, why were they removed?