Tabs in Vino/EdgeStar Help needed

I have a customer that has one of the "old" Vinotemp / EdgeStar units that measures the same as an EdgeStar unit inside but is a Vinotemp. It has the little plastic tabs in the slots that the standard units don’t have. I vaguely remember there being discussions in the past about "knocking" them out but would rather have someone who has done it describe how they did it. If you have done it could you please respond here so I can pass on the information and also have a place to point people in the future with the same question.

Thanks in advance,
Chas