Taras, welcome. Yes, the connections as you describe them on your AX120 appear to be the same as the ones on the different AX120 version which I linked above in post #374692. The outputs are the top terminals, and the right terminals are on the left(facing them)since that's the back of the sub.

James(DrBones)didn't check in again, so hopefully his AX120 didn't go up in smoke.

The only AX120 info that seems to be available is the specs in the chart also linked in the above post.
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Enjoy the music, not the equipment.