Its just like connecting a regular radio. There is no hideaway box for that unit. The only thing that you'll want to do different is connect the reverse wire for a back-up camera. If you don't have one you don't have to worry about it though.
As for the by-pass, look up the Alpine by-pass on
Ebay. (PAC-TR7) It works similarly. Its a relay to automatically by-pass the unit.