Zip ties on horizontal rods
When unpacking I didn't see them and didn't need to remove them to get everything out. And when I began to follow the guide to remove the screws for the plastic holders and the rest of the setup, they don't mention them.
So when I began the PID test, the head was making loud skipping noise. I shut it off within 5 seconds and now going through test and seems ok.
Just an FYI to those unpacking it. Praying it's not damaged after waiting all this time.