Yes, you need to get your glasses on a look a little closer. Even a cheap reading magnifying glass can help here, as those are really hard to see if you don't have perfect vision.
Each of those pins is for something...2 of them for reset, 2 of them for power, 2 of them for the HDD activity light, etc. There will be a group of wires coming from the case, each...like the power switch, will have seperate plugs.
The harddrive led matters that the + and - are plugged in correctly, put them backwards and it won't work. If this happens, just reverse them.
The reset and power does not really matter if get the + and - backwards, they will still work.