I found this old listing on Ebay, it appears to have similar parts, except that i have 5 instead of 9 chips (but i only have one output connector) and i don't have a ROM chip (but no Nubus either, so that might explain that):

http://www.ebay.com/itm/Apple-Mac-II-Video-Card-NuBus-Extremely-Rare-Gray-Scale-Card-Tested-Working-/390571588407?nma=true&si=inQysCrgVRoVQf1%252FBzvJk6eEFr4%253D&orig_cvip=true&rt=nc&_trksid=p2047675.l2557

So yes, it's probably a video card. But i doubt a daughter card is needed. I may be needing a portrait display .

And it still bugs me that the only connection to the motherboard are three traces of which at least one is ground and the other is power. Is that even possible?