Got the ring from an ES250--pretty much the same as the Camry LE models. I used my door switch wire as the negative trigger. It only comes on with the driver's door, not the passengers'--it's okay, I think it'd look weird if it did anyway. Note: when you open up the door switch, you'll see that it's a red and black wire or something like that, but after that, it connects to a connector that converts it to a solid red wire near the driver's kick panel once you remove the plastic door sill to reach the blue wire loom encasing. I just wired my constant to my radio constant because the ring light won't take that much power from it. As for that plastic trim circle surrounding the keyhole between the top and lower steering columns, I didn't use the one from the ES but used my stock one instead.
I also changed my cluster to LEDs:
Linear Mode
