The following information can be found in the manual which can be downloaded from Focusrites website, focusrite.com
Top Cover Removal

Remove the 12 crosshead screws fixing the top cover to
the top and sides of the module.

Digital Option Cover Removal

The rear panel digital connector area is accessed by
removing the small rear cover plate next to “DIGITAL
OUTPUT”. The plate is removed by removing the two
crosshead screws. Retain these screws for securing the
digital card in place later.

Installation

1. Place module on a flat clean surface with the bottom facing uppermost and offer the two crosshead screws supplied to the two countersunk holes in the base, using a small piece of adhesive tape to secure the head of the screw to the bottom
surface of the module.

2. Place module top uppermost and from the inside of the module place the two plastic support pillars over each screw.

3. Now offer the digital card from the rear of the module, lining up the screws from the base with the two holes in the card, and secure it in place with the two Nyloc nuts supplied.

4. Using the two screws that secured the original blanking panel, secure the digital card to the rear panel.

5. Plug in the 10-way cable to J3 (Penta/Trak Master), J4 (TwinTrak Pro - on rear PCB) or J8 (Voicemaster Pro - on rear PCB) on the main circuit board, and finally remove the adhesive tape from the base of the module.

• For use with Penta, links J3, J4, J5 and J6 should be
left fitted, as supplied from factory.

• For use with Trak Master/VoiceMaster
Pro/TwinTrak Pro, remove links J3, J4, J5 and J6.