Typically designers use through-hole plating to connect both sides, like this:
Depending on your design you may be able to get around this with some drilling, and solder wire to connect.
Also, this might be of interest:
Typically designers use through-hole plating to connect both sides, like this:
Depending on your design you may be able to get around this with some drilling, and solder wire to connect.
Also, this might be of interest: