Port

Type:enum
Range:Center, Origin
Default:Origin
Appearance:simple

, or

Type:int
Range:[1, 2]

Sets the active port for global or local positioning.

BRepImport Ports
Number Name Position Type Coordinate System
1 Center c point x'=[1, 0, 0], y'=[0, 1, 0], z'=[0, 0, 1]
2 Origin o=[0,0,0] point x'=[1, 0, 0], y'=[0, 1, 0], z'=[0, 0, 1]

Here, c refers to the center of mass of the imported object.