just installing an alpine head unit with the wiring I was wondering that the stock bose had 4 connectors come out and the harness i have wired to the new deck as two. Are the other two connectors needed? they are the connecters that are grey and came from the bottom of the stock deck?

 

along with that connecting the wiring harness i have now there is 2 black wires and a black and white wire alone. Do i connect them all together or where does the black and white wire go to? also have stock Bose amp for now but am also connecting a amp and sub in the trunk any help to what else i need to do?

 

The extra connectors are for the GPS audio (no longer needed).

The black wire coming from the radio is the ground. Connect that to the bolt that holds a square plate on the shifter down.