How do i hook this subwoofer up... - Pyle PLBW104 Car Subwoofer

If you have two subs to connect, place the speakers next to each other face down, you will notice that the connection points run in sequence +- and +-. Now connect the - (negative) from the one speaker, to the + (positive) of the other speaker. Now connect the open + from the one speaker and the open - from the other speaker to your amp.
If you have only one speaker it should be bridgeson your amp.
Your amp should have a bridging indication. On the connection points of each channel on the the amp, you should see a mark pointing to the first - and the last +. That will be your bridge