How can I create a power rail on my Arduino shield? I have an Arduino that has 4 devices within an enclosure.  Each of the 4 devices needs 5 V and GND.  I have a shield with lots of unused pins (see photo).  I'd like to "bridge" one row of the pins to create a power rail, and I'd like to bridge another row to create a ground rail.

I think most people are using an external breadboard for this.  Also, I see that there is a shield that has power rails, but I don't have room for it.  I'm looking for a female header, or another way to bridge these unused pins.

Note: I'm not asking about wiring voltage in parallel or amperage consumption.
Just bridge them.  Wire in your +5V connections then join them together on the back with lots of solder.  Maybe with a strand of 0.6mm single core wire along it for extra ruggedness.