Welcome to the forum,
@quacsteve. The e01680-100 is the generation 100 Brose motor, which was used in earlier Gen 3 Levo and Kenevo builds before Specialized moved to the generation 200 unit from mid-September of that production run. The silver tabs you're seeing in the mounting slots are almost certainly the motor mount inserts used on the newer Gen 3 Levo frame variant. They're there to locate the motor correctly in the frame pocket.
I wouldn't punch them out without knowing exactly what they're doing structurally. The safer route is to contact a Specialized dealer and ask about the correct mounting kit for fitting an e01680-100 into your specific Gen 3 Levo frame. It's possible you need a different hardware kit, or that the tabs are removable by design with the right tool.
One important thing to flag: even if you get it physically mounted, the motor will need to be paired to the new bike's TCU via Specialized dealer software. You can't just bolt a Brose motor from one Levo into another and have it work without that step. Worth arranging that at the same time as sorting the mounting question.
If you can post a photo of the tabs in question, someone here with hands-on experience fitting these motors may be able to give you a more definitive answer.