Hello! first time posting as i usually dont have any big problems, but im working on a 2.1 Amplifier from TDA chips (link at bottom) and im trying to figure out how to connect an SMD pad on the top side of the PCB to a GND trace on the bottom side. i want to keep all my Vss and GND traces on the bottom and the rest on the top.
https://easyeda.com/bassblaster505/TDA_2_1_Amplifier-6eb528577e8f4e1db16f0f7ebdba6fae