I used the KURY one that mounts in the bumper.

 

I did it on my Road King. I spent a lot of time researching this and it was very easy.
I drilled the fenders that others mentioned but some guys used 3M tape used on body moldings. The nut that holds the bumper to the fender holds the bottom of the tribar.
There are several part #'s for the light assembly, one with run/brake.

 

I did this on my RGU using part list below. The fascia part number is specific to the color of your bike - 597939-12DJO is for big blue pearl, so your part number will vary. The tribar light plugged right into the rear brake light housing - no splicing required

Qty Part# Desc
2 - 2995 - SCREW, TORX PAN HEAD
1 - 59739-12DJO - FASCIA RR FENDER, BIG BL
2 - 59818-09 - STUD PLATE ASSY
1 - 68074-07 - LIGHT ASSEMBLY, FENDER TI
6 - 7499 - NUT, FLANGE, CRUISE CONTR
2 - 59749-06 - PLUG, REAR FENDER

 

Thanks for the help.Didn't think of doing this until I came across one for a great price.I will be getting it this weekend.

 

Hi,
I have a 2012 Road King.. Can you please help me in setting up the same.. Which all parts are needed??

 

Here is thread of when I did mine ... there is parts list down aways (post #12)
Click here