How do I remove the Raymarine ST60 instrument read~out?

[Mervnjudy]

I am replacing the Raymarine depth sounder and read-out instrument and would like to use the location in the cockpit near the companionway, Portside where the old Raymarine now lives, for the new read-out instrument.
There is no rear access at this location.
Does anyone know how to remove this instrument.
Our boat is a 2007 model, 46 feet 4 cabin.
Thanks in advance.

[Yngmar]

ST60 is always secured from the rear, so do keep looking for that rear access.

[Moodymike]

When I positioned a Repeater in the Same position I had to attach it to the bulkhead with a sealant .  There is no access behind for the normal nuts , just room to feed the cables through to the engine compartment.