Viliv Super IO Port Pinout

I have took apart the VGA and Video Super IO plugs of my Viliv S5 and here is the pinout:

01 - GND
02 - Audio Left
03 - Audio Right
04 - Video Plug Key
05 - ?
06 - ?
07 - VGA Plug Key
08 - VGA V-Sync
09 - VGA H-Sync
10 - VGA SLC
11 - VGA SDA
12 - VGA Red
13 - VGA Green
14 - VGA Blue
15 - GND
16 - Component Blue
17 - Component Green
18 - Component Red
19 - Composite
20 - GND
21 - S-Video 2
22 - S-Video 1
23 - ?
24 - ?

As you can see there are 4 pins that are unknown to me (not used in eider of the plugs)
The key Pins are to be puled down with 1K