Firstly, solder the color ribbon cable to the MPEG2 decoder board's ribbon cable connector.

Pin assignment (from left to right):

24 (Gnd) 21 (Field-id) 20 (H-sync) 18 (Clk) 16 (D2) 14 (D3) 12 (D4) 10 (D5) 9 (+5V) 8 (D6) 6 (D7) 4 (D8) 2 (D9) 1 (Gnd) 

The MPEG2 decoder does not output V-sync but Field-id. Fortunately, the firmware of BT601Pro SDI mod. kit can detect the Field-id correctly.

Then connect the BT601Pro SDI mod. kit.

Done!