HI,
Someone said that you do not have to file the hole to fit the connector. All you need to do is take the connector apart, remove the wires from it, feed the wires through the headlight and reinstall the connector. "The wires feed through the bottom of the light where the ballast is, and then come out the back of the light again so that you can connect the wires to the bulb." from Drew

Is it possible?