Pins 14, 17 and 18 should be shorted and connected to +4.2 Vcc; pins 5,6,7 should be shorted to GND in SGH-600, 2100, 2400, N100 flash cable.
Pins 13,14,15 should be shorted; pin 5 should be connected to +4.2 Vcc in SGH-2200 cable.
This scheme is some kind of RS-232 Converter.
Almost all digital devices we use require TTL or CMOS logic levels. Thats why the first step when trying to connect the device to RS-232 port is transformation of RS-232 levels ack into 0 and 5 Volts. This is done by RS-232 Level Converters, like a Max 232.