I am hoping learn more about a fan from Comair, part number 1700305A. In the datasheet, there is a call out to a specific “GROUND CONNECTION”. What is the reason for the ground connection to be separate here (unlike most fans which are grounded through the return path)? Is it necessary to ground via this point, or can the fan be grounded through mechanical mounting to a ground plane in our design? Thanks in advance for the help!