wiring 2 dvc 4 ohm to hifonics zxi 1010

Okay, so first off here are the stats on what I have: 2 Alpine Type R 1242 DVC 4 ohm subs. Each is rated at 500 RMS, so this is what I would like to run them at. Hifonics zxi1010 amplifier: (This amplifier can run either 1 or 2 channels) 4 ohms: 250 watts x 2 chan. 2 ohms: 500 watts x 2 chan. Bridged, 4 ohms: 1000 watts x 1 chan. I want to run this amp at the last option, bridged 4 ohms 1000 watts x 1 channel. However, I took it to get installed, and when I picked it up, the company had wired it to 250 watts x 2 channel at 4 ohm. So, it is pretty much running at half what it should be, and I want to wire this correctly, like this. However, I do not understand this once I factor in the terminals on the enclosure, and with my specific amplifier, will i end up using both channels? But they;ll be bridged internally? Or will I only be using one.

This is what I've come up with of how to do it. Would this be correct? Or will I only need to use one channel and run two wires from each positive and negative?