On each side of the handle, there is only one space that has two holes next to eachother.

On each side of the body, there is only one screwhole that has a plastic post next to it.

These must be lined up properly. The handle can physically fit in either direction, but if you line it up incorrectly the screws will not line up properly and it will not be secure to put back together.

Attempting to screw it in on the wrong side or with the plastic alignment post in the wrong position can cause damage to the body of the device.