The easy way to be sure it's all wired in & the ability to use all the functions is to use a plu-in loom.
Otherwise, be sure to get the optional ignition & injection harnesses when you buy it.
Then be sure to specify to your installer you want everything connected.
FWIW, they're not a bad system.In fact I'd go so far as to say they are probaby the best piggy back interceptor system available on the market.
That said, they're not as good as a stand alone programable ECU.
In that respect, using Hondata makes good sense. Even when you're costing it dollar for dollar.