DAC+ expansion slot?

I noticed on the DAC+ that there is another 40-pin blank area that would allow soldering a new 40-pin connector.

Is this area used as a 40-pin "slave" so to speak? can I solder new pins there and attach a second device using a ribbon cable?

I am looking to add the adafruit 2.4" TFT HAT touchscreen:

Just wondering if I can connect that screen to the extra 40pin connector and it would work?


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