No honda signature accessory comes with instructions. There is a single pice of paper that has a code to scan and or a web site to go to for downloadable instructions. You can also look in the resources section in the forum for instructions. Most if not all the instructions for those accessories members downloaded to there.
That said, if your missing parts as It sounds, looks like u need to take it back and exchange for one that is complete.
you can also start here. Quick search as always found this quickly. Your instructions are here. U just have to look.
powersports.honda.com