318 magnum EFI kickdown

Ok I've searched and havent found what Im looking for. I have a 318 magnum efi running megasquirt and have a 904. I am trying to find info on how to setup the kickdown on the throttle body. Has anyone done this and can you point me in the right direction and is there a kit out there for this. I looked at Lokar but everything is for Carbs.
Thanks