Download the "CableChain.stl" file from here: http://www.thingiverse.com/thing:11978/#files
Use as many Cable Chain segments as you need for your bed movement, use these End Segments to create a Cable Chain perfect for your Prusa i3v Heated Bed! This design doesn't compromise the structure of the forward laser cut wood panel but does require a cutout of the rear panel.
Wires from your power supply and RAMPS board pass through this cable chain to the heated bed to ensure they don't get caught on the moving bed.
Oct 4th Update: I created a bracket for the rear of the bed so the wires won't get caught between the moving bed and the stepper motor at the back. Zip-ties hold the wires in place along the bracket and into the cable chain. It works really well!
Sept 27th Update: I removed the remaining side mounting holes on the Male and Female ends (improves print quality of female button holes). Also separated the pieces into individual STLs to better arrange them for printing. Installed the parts on my printer at home and uploaded photos.