On the product description for PIM412, there’s an error in the pin numbering. It reads “… pop it straight onto the bottom left 5 pins on your Raspberry Pi’s GPIO header (pins 1, 3, 5, 6 9).”
I think it should be (pins 1, 3, 5, 7 9).
Just thought it could catch somebody one day.
Somebody made a typo, further on it says
Raspberry Pi-compatible pinout (pins 1, 3, 5, 7, 9)
There is a contact us link on the shop page you could use to e-mail them so they can fix it. Shouldn’t be a big issue. It will be connected to pin 7 if you use the breakout garden hat or connect it to the GPIO with the female header.