Mount the DBoxes

Slide out the inner rail (1) from each mounting rail as far as you can, and then press the metal clip (2) to detach it completely from the outer rail.

Align each inner rail (1) to the rear section of the chassis side panel (2) with the release tab (3) on the outside of the rail and the rail catcher facing the rear as shown.

Attach the rail (1) to the chassis (2) using ten #6-32x3/16 screws (4).

Position the right or left rail on the inside of the right or left of the rack. The smooth side of the rail should face the inside of the rack. The brackets (1) should be facing outwards.

Line up the square pegs (1) on the rear bracket with the square holes (2) of the rear rack post.

Press the lever (1) to load the springs and then move the rail to insert the square pegs through the square rack holes. When the bracket is fully engaged, you will hear a click.

From the back of the rear rack post, the engaged bracket looks like this:

Adjust the rail length so that the front bracket reaches the front rack post.

Insert the front bracket (1) into the front rack post (2). Make sure the square pegs (3) on the bracket are fully inserted into the square rack holes. Push until you hear a click when the bracket is fully engaged.

Repeat the same steps on the other side of the rack for the other rail.

On each side of the rack, orient the front assembly rail attachment (1) in the direction shown in the figure below and fix it onto the front of the rack post, screwing it into the two screw threads (2) on the front bracket of the mounting rail. Use the M5x13L screws (3) from the front assembly kit.

Screw the front assembly chassis attachment (1) onto the front of the DBox at each side, using two of the provided #8-32x3/8 screws (2).

Extend the intermediate rails (1) equally on both sides of the rack until they just emerge from the rails.

You can alternatively extend them fully. When fully extended, they lock into position which gives you assurance they will stay in place with equal extension length. However, due the weight of the DBox, it is usually easier to work with shorter extensions.

Using a mechanical lift or two people, one at each side of the chassis, carefully line up the inner rails (1) on the chassis sides with the extended intermediate rails (2) and insert the chassis horizontally into the rails until you hit a stop.

When you hit a stop, press the release tabs (1) on the inner rails to fully retract the chassis into the rails.

Tighten the front assembly by locking the thumb screw (1). This usually requires a screw driver.

Clip the bezel to the front of the DBox by clipping it into the holes (1):

The bezel attaches onto the front: