Hi all i have a 2004 touring with bose and as many im not as happy as i could be so im going to install a 12" sundown audio sub and install a planet audio double din(it was new and free for me) so im not gonna be picky lol, it came with the metra harness which is plug and play which hooks up via rca cables, the thing thats throwing me for a loop is the other harness that came with the double din that has all the speaker hook ups as well(hard wire) that has 16 pin plug that goes directly into the back of the radio...do i disreguard the second harness....i never dealt with bose before..also how many factory harnesses out of the 4 WONT be used and which ones... Thanks in advance!

Matt