So I’ve been hearing water slushing under/behind the dashboard. So when I googled it said the ac drain line could be clogged which I believe to be true cause I never seen it drain. Can somebody point me in the direction of that drain line please

 

If your car is a 3.0 V6 then look no further than above the passenger sub frame.
Being a V6 car there is a known problem that the AC drain actually causes the front subframe to rot out. If you can, install additional tubing to get the drain to not piddle on the subframe.