Impact .25 Non retractable shroud

I would like to fit my LDC on the original shroud. There is an endcap that has 2 holes in it that i know some have opened (with some help with heat). Does anyone here know what adapter i need to have? The LDC is from http://air-fectivetuning.co.uk/store/product/fx-impact-2-stage-shroud

Cheers!