Navtool Intall help
 

I just purchased the navtool interface. NISSAN 370Z 2009 VIDEO INTERFACE with BUILT-IN HD SMARTPHONE MIRRORING via HDMI
The navtool came with zero instructions but for my understanding from the website is is completely plug and play. I installed everything except the rearview camera at this time. I started the car and saw that I was getting power to the unit. I wanted to try the smart phone mirroring but have no idea how to select the navtool from the factory stereo. I emailed navtool and asked how I activate the navtool. Their response was: with push button / remote/ or reverse.
The navtool didnt come with a push button or remote. LOL Am I missing something?
Also there were extra wires on the harness: Can-L, Can-H, ACC, Ground, and reverse.
Navtool said CAn-L, and Can-H are not used. and I did not use reverse since no rearview camera at this time.
Any help on how to activate the navtool to mirror my phone to the screen would be appreciated.
Thanks