Adapter needed when installing on certain Harley Davidson models.
LED connector needed:
2015 CVO Softail Deluxe FLSTNSE
2015 Electra Glide Ultra Classic FLHTCU
2015 Electra Glide Ultra Classic Low FLHTCUL
2015 Ultra Limited FLHTK
2015 CVO Limited FLHTKSE
2015 Tri Glide Ultra FLHTCUTG
2014 CVO Softail Deluxe FLSTNSE
2014 Electra Glide Ultra Classic FLHTCU
2014 Ultra Limited FLHTK
2014 CVO Limited FLHTKSE
2014 Tri Glide Ultra FLHTCUTG