Here are the pinouts for the Apple Macintosh II Video Card:
Pin Signal
1 GND
2 Analog Red Channel
3 TTL Composite Sync
4 GND
5 Analog Green Channel with composite sync- used as Monochrome Signal
6 GND
7 NC
8 NC
9 Analog Blue Channel
10 NC
11 GND
12 Analog Green Channel with composite sync(not used)
13 GND
14 GND
15 NC