I checked the mail this morning and had a mysterious package from a drop-shipping warehouse. Inside it were some Bafang-compatible mechanical brake levers that I didn't remember ordering.

I'm not sure if this was some kind of mix-up, or if they were intended to be included with the kit I bought, but I don't see them in the original ad on AliExpress. Regardless, this should be slightly easier to set up than gluing in a magnet for the Hall-effect brake switches they gave me in the Bafang box.

Thanks, I guess?

I found out later that the yellow connectors are made by a company called Higo. This is useful info to know for later, especially if I have to make any new cables.