TYAN Tank GT20 Service Engineer's Manual page 28

6. Reserve the distance same as in Step 2 on rear bracket.
Secure the rear bracket to outer rail with 2 M4-4L(C)
screws.
7. Secure the outer rail to the rack using 2 brackets and 4
M4-8L(E) screws for each side (A). Secure the mounting
brackets from inside, not outside, of the rack (B).
A
B
20
Mounting Bracket
Chapter 2: Setting Up