I have a couple of no-name metallic grips (which follow the black-chrome design of the Hasselblad nicely) and they can be freely be set at any direction, at the left or side of the camera featuring also a shoe for a flash.
The "official" Hasselblad hand grips are designed to be set at the left side of the camera because they come with a built-in shutter release. The grips for the right side are the motor winders for the 503CM and the F line.