DUAL XNBP12D subs make lights, light up Help!

I have the subs(topic), its connected from the factory subs of my '00 toyota Avalon (with jbl premium sound and built in factory amp). without using the aftermarket amp. I want the lights (its built-in with the subs) to light up with the beats. But there are 2 black and red wire (pic below) its connected to the aftermarket amp that i am not using. So what do i have to do to make the it light up with the beat? Thanks!

Reply 1 : DUAL XNBP12D subs make lights, light up Help!

I moved this to the Audio, Video and Security - Tech forum. You're much more likely to get the help you're looking for there than in the Avalon-specific forum. But there's a redirect for anyone that might go looking for your thread in that forum.