Hooking Speakers Up To A Powered Sub?

[Kranny]

I've been trying hard to get my speakers playing along with my powered sub. because i have 2 choices so far..bass or the ability to hear the lyrics to a song.

i have a 12" sub (pictures included), with High level inputs, low level (RCA) inputs, and "speaker" terminals (unknown if input or output).

I need a way that i can hook up my speakers to my subs amp, thats all im asking. i know you guys can seriously help me out on account of having the ability to hit a 151-160 on a TL

My sub "specs"

Taped up the terminals because of a little air leaking, very audible when im banging

Other dials, inputs etc etc

Front of the sub (3 cu. ft. enclosure)