A couple of months ago my new A127 filter arrived and I took a few pictures to demonstrate how to install it with the A127 BOM because it seemed a bit confusing at first. Hopefully this can clear up any questions you might have!
Remove the ribbon cable from each stage of the filter.
Remove the Jumper from the connectors to make room for the new ribbon cables from the BOM.
Connect the BOM ribbon cables
Then carefully install the modules in your case and enjoy some cool and flexible filtering!