How to make connections of ArduCAM Mini 2MP OV2640 Arduino Camera on ARDUCAM MULTI CAMERA ADAPTER MODULE FOR ARD (B0074)

Please help me as I cannot run the cameras using adapter B0074 on arduino mega. In the below link the demonstration is for Arduino uno board. I need connection changes for mega board. i dont know how do i connect MISI MOSI pins to pin number 50-52 as i dont see MOSI MISO signs on the board to connect. and please let me know what is the number of chip select (cs) pin.

ArduCAM Mini 2MP OV2640 Arduino Camera Demonstration