First, make sure the circuit board is oriented so you can see the top of the capacitor you're replacing.

Next, use a black Sharpie or similar permanent marker to mark where the negative stripe of the capacitor meets the PCB.

Now you can remove the electrolytic capacitors. There are 2 methods you can use:

1. Heat one capacitor lead and lift the capacitor lead slightly out of the board. Keep doing this until the capacitor is free from the circuit board

2. Desolder both legs of the capacitor, then pull the capacitor out of the circuit board.