On some Model 3 Compressor Controllers, that were shipped - the three pin terminal connectors may need to be manually trimmed for them to properly connect to the compressor controller.
If the three terminal connectors that you received look like this:
and when connected to the compressor controller appear as such:
Trim the excess plastic with a utility knife to make the end result appear as:
and When installed into the Compressor Controller, to be flush as shown below: