Polarized
Component
Pay special attention to the component’s markings indicating how to place it on the PCB.
Polarized components can only be connected to a circuit in one direction.
Locate the four battery clips.
Locate their positions on the PCB. Insert the battery clips . Make sure clips point toward each other so the
battery fits.
Ensure clips are flat against the board. Then solder from the bottom of the board.
Switches
Locate the two slide switches.