If you had original H7 headlights and are retrofitting D2S headlights taken from a car wrecker, choose the D2S coupling and they will plug & play into the H7 socket of the headlight.
If you have original D2S headlights and want to mount an LED lamp, they are compatible with modifications: you will have to intercept the + and - power supply upstream of the original xenon control unit and create a plug to power the LEDs.
Keep in mind that in the case of headlights with dual dipped / high beam function via an internal dimmer or snap mirror game, the EDGE Kit concentrating all the power on the low beam will not give sufficiently powerful glare. In case your headlight also has an additional glare lamp then this won't be a problem.