HRAP 4 Kai Quad mod help?

I currently own the Hori Real Arcade Pro 4 Kai for the PS3 and PS4 and I want to add Xbox 360/Xbox One capabilities to it but I’m not entirely certain how I would do this. I’m thinking I should use Phreak Mod’s Crossbone for the Xbox One, but how would I add Xbox 360 capabilities without having to use the PS360+? Would I just do a pad hack, and if so how?

Theres always the pdp mortal kombat x controller that supports both 360 and xbone, but i believe they are on backorder right now iirc.

they will be back in stock September per PDP
can probably get them on Amazon them too

Instructions on the padhack in the 3rd party xb1 thread

Cool. Thanks @Vicko and @CHPrez