Not really. All your encoded motors have the same connector with the same sequence.
Yes, but aren't the RoboClaws the popular? I was just thinking that if the Roboclaws are popular and all your motors with encoders have the same connector then it would be natural to supply a harness. Or better yet, get RoboClaw's manufacturer to make a version that allows your encoded motors to just plug right in since I would think your motors are not unique to Pololu but are a popular motor on the market that you are reselling. Also, you seem to make your own motor controllers so it seems to me you would make them pin comfortable with your own motors since most of your motors are the same connector.