You should just connect Ign Sense to Main Power and disregard the Amp Remote. It is used to relay other devices like amplifiers so that they are only on when the unit has power.
Certainly do not apply power to the Amp Remote, smoke is about all you'll get.

Ign Sense tells the unit when the car is running or in Accessory mode. That way you don't kill your car battery if you leave the unit in while your not in the car.
My recommendation is to not leave it in the car unattended anyway.