HOMCOM A91-108 Assembly Instruction Manual page 4

Step 3. Install Push-ups
The first (3) is pinched into the fixed tube (note that the hole and the hole), and then
passed through the (D) M8 * 35 in Semicircular head socket cap screws, and finally (C)
M8 Anti-loose nut fastened.
Step 4. Install Twisted disk
First put the (5)twisted disk into the card slot (note that the hole and the hole alignment),
and then with(E) M8 * 50 of the semicircular head socket cap screws , and finally with
the (C) anti- loose nut fastening