Oh, but which one is that jumper? I wasn't able to identify it... I discovered that none of the pins/needles on the board are connected to the CS (Chip Select). The only CS (Chip Select) link can be made through the big green socket with a lever. The Pins/needles arranged in pairs have all other connections like GND, 3.3V, DO, DI, RESET, SCK, but like said, there is no CS. I think they are for some other chips but not those SPI.