Attaching amp to stock sub connections 2009 Yukon Denali

[brh11]

Hello guys.

I've recently been attempting to get my amp to connect to the stock boss sub woofer outputs but have had no luck.I Have attached my line converter to the output going into the sub woofer.Does anyone know which connections should be used,I have a wiring diagram with the positive and negatives for both left and right of the sub woofer but no luck.If anyone knows anything that would be great.





Thanks!