The bulbs are adjustable and I adjusted mine to this length, it comes out to the oem bulb length.
I mounted the box here on the passenger side. I didn't take a picture of it, but the kit comes with an adapter plug that plugs into the OEM bulb socket. One wire goes out of the box to the led bulb and the second wire plugs into the oem bulb socket with the adapter. You can see it plugged in at the bottom of the pic.
I wire tied the harnesses up under the radiator rail
The adapter going into the OEM socket did not feel tight at all for my liking, so I wire tied around it to keep it snug. I also wrapped electrical tape around the connection for the adapter and OEM socket.
I drilled a hole to mount the driver side box. Fits perfectly beside the washer fluid neck and plenty of space from the CAI.