subwoofer and amp hook up

I was wondering if you can help me out.i have a pioneer amp gm-5200t and i have two kicker 12' comp's c12-4 4ohm 300 watts and the guy i bought them from had it bridge to one channel and i don't know how he wired the two 12's to one channel. the box is not ported and have the jack's on both sides of the box for the speaker wires. i just don't want 2 blow them can you help me out the best way i should hook them up 1 or 2 channel..i'm  used 2 hooking amp's and sub's just a lil confused

 

wire 1 sub to to get the 4 ohm bridged output of your amp.the only way to use both subs is to

1. wire them in series for a 8 ohm load bridged
2. 4 ohm load on each channel which is the same thing as 8ohm bridged mode

1000 watts of lp, now need sum hp an mids