After making my scooter all DC, I got the one HID I ordered installed. Putting the projector in was very easy. The hard part was figuring out where to put the harness and ballast. I looked at several locations, but found a good spot that would work when I add the second light. Some double sided tape and several zip-ties later I had it all mounted and wired in. I had planned ahead and many months ago when I had all the plastic off I added a pair of heavy wires directly from the battery to the front area, with its own fuse. I just had to hook the ballast into those wires, then cut and splice the existing headlight switch into their control harness.
I have not yet installed a switch for the green angle eye. I think I'll add a little switch that is enabled when the key is "ON". The switch will turn on the angel eyes and eventually the ground effect lighting. Headlight is always on when engine is running, high beam on/off via the stock switch. Effects optional with the key.