I'm not sure if you still need help with this, doubt it since it's been 6 years, but these cameras need a 24 V AC input. Each screw connects to the output of a 24V AC powersupply and the other needs to be grounded to the housing or conduit. These cameras are terrible and should be replaced with something more practical.
Also, if you do end up going with these, you'll need to run a standard 110VAC to them but splice in a 24v step-down transformer. Make note of the amperage required for these cameras and match that up with the output of the transformer. They're usually rated in VA so remember
I = S / V , V = S / I
I = current
S= volt-amps
V = volts
To get your desired voltage, divide Volt-Amps by Current