Jack,
Here is a picture of my finished wiring harness on my Manx.
To the left is terminal block that I use to distribute hot leads. If you look on the bottom on the terminal block you can see connectors that join sets of screws together. You can get the terminal strips and connectors at your local Radio Shack.
As an example here is how I wire the blinkers. In your case I would run the black-white wire (right turn signal) to a screw. I would then connect at least four screws together (two up top and two below). From those 4 screws I would run a wire for the front right blinker, the right rear blinker, and the indicator light for the right side.
Do the same for the left side.
You can also incorporate a flasher set up by taking a Bosch relay which has two hot supply leads when activated. These are pretty common. By having these two isolated at rest leads you isolate the right and left blinkers until such time they are activated. You would take a power lead to a flasher, then to a relay, then to a toggle, then out to the relay. From the relay with two "out" power tabs you take one to the left blinker circuit on the strip and one wire to the right circuit on the strip. When ou flip the switch your 4 blinkers will flash as well as your left & right indicator lights.
For the headlights, I take the power supply wire from the relay I use and run it to a terminal. I connect 6 (three up and three low) on the strip. From those 6 I run wires to the front marker lights, the rear marker lights, the gauge lights, the license plate light, and then the main supply for the hi/lo beam selector.
I also use a relay for the horn and for the wiper self park circuit.
Lastly, the terminal strip on the far right is for my grounds. I run them all back to one spot. It uses some extra wire, but it is easy to trace any future issues. And it keeps them relatively dry and clean.
If you have any more questions let me know.
This is only one way to wire a buggy. There are many many other ways.