NO CD pin in SD card module by LC Studio?
I'd say that the pin description given by LC Studio is for the SPI access mode. In that mode you don't use the Card Detect as it is used as chip select of the SPI bus.

If you want to use the SDIO interface the CS pin turns into the CD pin. MOSI is command/response and so on. Have a look at the Wikipedia page, it shows the pin mapping for the different modes.

Based on the schematic I found on the forum of element14, you can also see, that pin 1 is directly connected to the CS pin of the header, I don't know all the details, but that might work for SDIO as well.