Saddlebag speakers

[Ikarus]

I have a 2005 venture that the previous owner gave the "streetglide" treatment to. I'm replacing the faring speakers with Polk DB402 and eventually an amp. My question is how can I add speakers to the saddlebags without running wires from the faring to the rear? Is there a relay I should look for, or existing wiring that would be tucked up some where? 

Just in case I don't have the trunk so I have no idea where an audio hook up would be.

[Squidley]

The trunk that originally was on there had speakers in it. There should be a connector under the passenger seat that could be used.

[Ikarus]

Thanks I'll have to check it out

[Dutch Navigator]

Must be one of the two connectors on the right.

 

 

[Davvid]

Is there any update on this? I am new to The Venture and the front speakers work but the guy who sold me the bike refused to sell me the rear seat with the speakers. 

Ikarus, did the Polk DB402 fit into the space where the factory speakers were fitted? How is the sound?