Kisan Signalminder

I had  one on my previous ride (BMW R1100RT) for many years and loved it.
Has anyone installed it on his/her S'wing?
Since I'm a neubie in the S'wing community (one month), where's the relay box situated ?  Is it complicated to access it?
I looked on Kisan's site and they cite model SM-5 for my 2006 S'wing.
Any help and comments are welcome.
Andy