[zbanks]

There are two bases that you could be talking about.

The circular black piece that matches the green PCB helps shield the sensor from light, as others noted. There really shouldn't be any reason to remove it since it's pretty thin and just about the same size as the PCB itself.

There is also a triangular piece that the former piece can screw into for mounting on a transmission. This piece is unnecessary. This year, they weren't even in the KOP since the CIM-ple trannys have the correct mounting holes to begin with.