whats the deal? 4 terminals on sub

can someone tell my why theres 4 terminals on each side instead of 2 like usual? the sub is an audiobahn dub200.

  -thanks

You can run a set of wires into your box, and then parallel a second woofer in the same enclosure by connecting it's wire to the extra set of connections.  It just makes for a neater install.  It really isn't any new technology. 

so if im only running one sub in a single box, does it matter which red and which black terminal i use? like say, should i run the wires to the far left and the far right (orange)? or should i run them to the right black and then the right red (pink)?

-thanks again