How to install GT1 Series LED bulbs? Step 1: Unplug the factory halogen bulb and remove it from the socket. Step 2: Align the tabs with the slots and insert the GT1 LED bulb. Step 3: Rotate the LED bulb to secure it, making sure the LED chips face each other between the 3 and 9 o’clock positions. Step 4: Reconnect the power plug.
Source: https://rimthin.com/collections/gt1-series-led-light-bulbs