So I am trying to ghetto rig some nice speakers to put in my friend's boat. I realized I had my old '99 4runners head unit still around with the stock amplifier.

I am planning on making a waterproof box and running the head unit off a separate battery from the boat's.

Any of you know if it is possible to buy the two male wiring harnesses that plug into the back of the stock amplifier so I can splice them into the battery and new speakers?

Thank you and let me know if the question is confusing.

 

I got mine from a stereo store or try crutchfield. Assuming thats the side you need... Cheers Tx