For today I bring you the world most advanced video card for a classic. Or not. Its weird, I bought it. The end.

nView Corp. ©1991 Mac Classic Adapter

I think its video, but we all know how that goes. Not all connectors are created equally. The green lead apparently connects to the SIWM chip? Seems weird. The only info I can find:

Adapter kits

Required for Mac SE, SE/30, 512, Plus, Classic, and DEC VT 340 terminal. Mac kits install internally with no cutting or soldering.

Adapter Kits

Macintosh SE/SE30 Adapter Kit; Macintosh 512/Plus Adapter Kit; Macintosh Portable Adapter; Macintosh Classic Adapter Kit.

http://www.thecomputerarchive.com/archive/Displays/Presentation/nView%20presentation%20products.PDF

Pricing:

http://www.thecomputerarchive.com/archive/Displays/Presentation/nView%20MediaPro%20and%20ViewFrame%20LCDs%20for%20Overhead%20Projectors%20(1991).pdf