This article describes mounting an Elo BackPack onto the back of an Elo IDS 02-Series display while using the Elo Wallmount kit.

The Elo Backpack fits great between the IDS-02 monitor and the wall mount kit, E275050, using the included ECM spacers that come with the wall mount kit. Just mount the Elo Backpack to the back of the IDS-02 monitor using the Backpack mounting bracket kit, E80259, then install the wall mount kit. 

The Elo Backpack is only 24mm thick which is much thinner than the Elo ECM module which is 37mm thick so there is more than enough space for this setup.

See photo below of the Elo Backpack mounted to the back of a 3202L IDS monitor using the Backpack mounting bracket kit.