This board is a prototype for the project and is for testing. It is missing the soldermask and silkscreen layers, so correcting mistakes is very possible. The board was printed correctly, but somehow I missed one via (grr) from the top layer of copper to the bottom, and the software I used (ExpressPCB) of course doesn't have any checks for things like this.

I would like to know how to add my own via. There is no ground plane on this board because I used the bottom layer for traces to lower the size of the board. It is a basic 2 layer "prototype PCB".

Below you can find a picture of the portion of the board front and back with the trace ends circled. They are lined up **directly** over/under each other. I need to connect those two.

**Top**
![enter image description here][1]


**Bottom**

![enter image description here][2]

The two solutions I'd imagine would work:

 1. Use a tiny drill bit or mill and drill a hole through, and make sure solder is filling the whole and touching both traces
 2. Just solder a wire to the top trace, wrap it around, and solder it to the bottom trace.


  [1]: https://i.sstatic.net/YenfW.jpg
  [2]: https://i.sstatic.net/FGY3K.jpg