mono amp+svc sub

I recently upped my sub from 8" to 12", the 8" was dvc the 12" is svc. I have a A/B monoblock with 2 Positive and 2 Negative outputs. The sub is 4 ohm. How do I wire the amp so it is only a 4 ohm load?
        __________________ It is far right pos and far left neg now.
        + -
        +_____+    -_____-

Any help would be appreciated.

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A Polk sub of 8" was the 1st that I had, then A focal 10" it fried up like bacon and I was sad. Now its a 12" but only 1 coil how to wire correctly is making me boil.

There are 4 terminals, but there are only 2 connections.  Positive speaker wire to either of the positive terminals.  Negative speaker wire to either of the negative terminals. 

Both positive terminals are connected internally.  Both negative terminals are also connected internally.