I love it, you have another project I appreciate the time you put in these Mazda’s. Gives me a great deal of pleasure seeing the work that goes into getting the cars to the needed love.
Seems like it's the hole used for "condensation" line of the air conditioner. The few a/c 2s & 3s I've had would dump there, or sheet metal adjacent the trans on the passenger side. That overhead console looks nice!👍👍