Ordered mine at end of last week... arrived today in the mail... took about 15 min to install. You will need to open both saddlebags... locate the two 10mm bolts (head facing front) and loosen them (not on very tight from factory...).

Using a plastic trim pry tool (small one from set bought at Harbor Freight months ago for the car... finally got to use one of them!), gently pull the plastic trim panel above the light fixture -- starting from the outside and gently (gently x2) pulling until you get to the top-center of the trim piece. There is a "catch" there... I used the pry tool to finesse the upper (larger trim piece over tail upwards to release from the top edge of the trim panel.

Then, pulling gently up on the upper trim panel, you can pull the entire light bar assembly out. Use a towel or something to cover the lower trim panel where license plate mounts so you don't inadvertently scratch that plastic.

Locate the two bulb holders -- twist and turn to release -- remove OEM and insert the LEDs (I used latex glove "just in case..." to avoid transferring finger oil to the LEDs). Do a test of the brakes before assembly (reverse all the steps).

I'm liking the simplicity of this mod. Flashing red lights will certainly help vehicles behind "see" that braking is occurring (I sure HOPE at least!). No need for aux. resistors or relays like when adding "Switchback" bulbs for front signals (did that yesterday).

Link for purchasing bulbs...