We had a fairly extensive discussion about panhard bracket placement on the HAMB within the last couple of months.

General consensus was, frame bracket on the drivers side for the front panhard.

It doesn't matter which side the rear panhard bracket is on.

People reported their cars handled just fine with the panhard frame bracket on the passenger side.

If you plot the arc the end of the panhard swings in, there's not really much horizontal movement due to the limited vertical travel.

Leave it as is and enjoy the car.