Speaker and head unit fitting -

Can I tap into the rear speakers for my aftermarket amp? can you put 2 speaker wires in one slot I'm nearly ready to finally install this custom subwoofer into by car but there is one more step can you connect pcie 40 in 30 slot you total control of multiple speakers at one time It also allows you to lower or raise the

can you tell when a slot machine will hit_ Push the speaker terminal and insert the speaker cable into the cable insertion slot Sound cannot be heard if it is inserted all the way to the protective