you cannot tell car it has aftermarket hids lol, all you can do is disable the tests the car performs on the lighting circuits to check for blown bulbs etc, only real way forward. cheers but second above comment lmfao!!!
You want a capacitor, not a resistor. Make it quick, they'll be an MOT fail in a few months, as the MOT test is changing to specifically include failing a car for retrofitted HID without self levelling and headlamp washers.