I have an Armstrong split system AC unit and the fan capacitor that a technician installed only
Blows air on a very low setting. I have a replacement capacitor but I am not sure of where to
Connect the wires. On the existing capacitor it appears that he taped 2 capacitors together and wired them in series. The upper right connector a brown wire and the lower right connector has a yellow wire. The upper and lower left connectors have a wire connecting themselves in series. The replacement fan capacitor has four connectors. I'm going to take a guess in that I should connect the brown wire to the upper left connector and the yellow wire
To the upper right connector and leave the lower two connectors open. Am I right? Also, do
I need to discharge the existing connector before removing the existing wires before I replace it? Very much appreciate the help.

First of all call the tech back and have him find out why you only have low speed.
The capacitor really does not control fan speed but it can control the horse power rating.
Before something gets burnt up by you misplacing the wires I suggest you follow the wiring diagram on the inside of the blower door to make sure it is done correctly.
You could also have a bad relay or circuit board. The thermostat could also be wired incorrectly.
With the way he wired it who knows what goes where at this time.