It comes with instructions. It is very simple cause wiring is already there. So, you just have to remove the grips and connect the new ones. 15 min work.
I would like to know if yours works ok. I installed mine and I am having a hard time. Basically, when I turn it on, it works, but I am not able to reduce heat level or turn it off. Just have a red signal w 3 stripes at dashboard and two very warm grips... And the most interesting thing: it is working without engine working. According to Manual, heated grips only work when engine is running.
I disassembled it today and definitely there is no way to install it wrong. You have a 3 pin connector on the left and 2 pin connector on the right. And that is it. A small button to shift status... and nothing more.
My Rocket is 2020 R. I lost hours trying to find what is going on and I have no clue. I think the grips are ok, cause they work... I don't know... maybe my bike needs a new software version... ( I am saying that cause heated grips are controlled by instrument panel. )