Yes, you can use the brake light wire to power the canopy's brake light.
Cargo light is something else, there are a few options.
I have mine hooked up to full time power(fused), so I can turn the light on and off from a switch on the cargo light in the canopy, this is better for my purposes/uses.
But battery could be drained if left on, never happened to me in over 20 years with different vehicles but could happen.
Some, if not most, Rangers have a Cargo light on the Cab's 3rd brake light, lights up the bed, this is activated same as turning on the Dome light, main light switch dimmer turned clockwise all the way.
You could tie into that circuit.
Yes you could use parking light wire, it is a fused circuit, like brake light wire, you would have to have Parking lights on of course, to get cargo light on, and cap light would stay on unless it had a switch.
You do need a 3 wire connector, brake light 12v, cargo light 12v and ground, they can share the one ground, you use a connector so you can easily remove canopy.
Last edited by RonD; 06-01-2016 at 05:03 PM.