connect a Pushbutton Switch to SparkFun LumiDrive LED Driver without a Breadboard

How can I connect a Momentary Pushbutton Switch - 12mm Square to SparkFun LumiDrive LED Driver without a Breadboard in order to control SparkFun Lumenati 3x3. A scheme will help a lot.

Unfortunately I don’t have a schematic, but there are 4 spare I/O pins on the board that can accept a button. Connecting the button between one of those and ground should work.