The 'cigarette pack' as you have surmised is the HID ignition controller, which you will want to remove.

Then, you must find what the DPO (Dreaded Previous Owner) did with the original 3 wires Lo, Hi and Common. DPO probably spliced Lo and Common to the ignition box, so you need to find that missing 3rd wire. Of course, you probably have figured out all of this.

Once you have found the 3 wires, you need a 'factory' headlight socket, either new or from the local boneyard and some good crimp-on wire splices.