Step 1: Dismantle the Light
The next image shows the main housing after dismantling. We're only interested in the white plastic piece with the lamp, the solar panel, and the circuit board/battery pack. Carefully detach the solar panel from the main housing and discard all of the housing.
Step 2: Prepare the New Housing
Step 3: Detatch Solar Panel Wiring
Un-solder the two wires leading to the solar panel from the circuit board. Pull the wires completely free of the housing and set the housing aside. We're re-wiring the solar panel next.
Make a note of which wires attach where so you can put it back together again.
Step 4: Prepare the Solar Panel
Next, drill a hole large enough to accomodate the two wires on the low center of one roof side. The solar panel will lay on the outside of this roof panel with its bottom edge resting on the roof edge, and the two wires will go through the hole to meet the electronics inside.
I also took this time to repaint the old fixture with a nice fresh coat of black spray paint.
Step 5: Run the New Wire and Re-Attach to Circuit Board
In the image here, the wires needed to run through a small hole in the back of the white plastic thingie so that I could re-mount the circuit board in the little rectagle it came out of.
Your situation may vary slightly, or might not resemble this image in any conceivable way. Hard to say.
Anyway, pop in a NEW battery to test everything, as the supplied re-chargeable battery may not yet have a charge in it.
Step 6: Suspend Light From Ceiling of Fixture
The terribly unfortunate image here shows the inside of the metal fixture with the wire wrapped around one metal crossbar.
Yes, I know.
Step 7: Mount Solar Panel
Step 8: Finished!
By the way, my neighborhood Lowe's had the solar cell walkway light on the markdown shelf for half price (paid $8.60). I alreadyhad the wire, so for less than 1 month's cost of actually burning gas, I now have a self-renewing light source.
Oh... Uh... I mean, I got the solar light from the trash dumpster at the local police station... Yeah.