Help with non bose sub and amp install

[pwestbball11]

I have been researching on this site for the past hour or so and i have figured out a few things about installing and amp and sub in a non bose 2005 coupe... I know you have to use a loc converter and some how tap into the rear speakers. I understand how to run the power wire and how to set up a ground wire. However, i dont understand how exactly to tap into the rear speakers or how to run a remote wire. Please someone help me out here.

[Wrathernaut]

Remove the trim around one of the rear speakers, splice into the wires going to the speaker to get the audio signal for the LOC.

[pwestbball11]

Will i lose functionality to that speaker?

[Wrathernaut]

No, you just tie the wires to the exiting wires, forming a Y, so the signal goes to both the speaker and the amp.

[pwestbball11]

Thank you sir, your always helpful