Step 1: Remove the head lamp if needed to have a better access to the back of the head lamp.

Step 2: You will then see the back cover for the HID bulb, remove it.

Step 3: Release the metal clips that holds the D1S/D1R HID bulb and pull it out.

Step 4: Remove the cable from the stock 4300K D1S/D1R bulb and reconnect the cable to the JDM D1S/D1R HID bulb.

Step 5: Put the JDM D1S/D1R HID bulb back to the head lamp and re-lock the bulb with the metal clips and cover back with back cover.

Final: Put back the head lamp and enjoy your new headlight.