2005 JDM EV MOD INSTRUCTIONS Help

I've been interested into adding an EV mode to my 2005 Prius and I began looking for instructions how to do it, over the past few days I've found a site that sells JDM parts and I thought why don't I check to see if they have the Original EV button. Long story short I've just ordered it and I don't know how to install it on my 2005 Prius. I figured it would be plug and play but I don't exactly know where to plug what into what to play with my new toy.

All of the previous material about this issue seems to have disappeared over the years which really is a shame. Thanks to trickel down economics I could afford a good looking car that could also go electric as well for about 2 grand...


Heres a link to the website if anyone is interested in doing this themselves,

 

Because I cant post links yet apparently...