What does this symbol mean in the wiring diagram?
 

Sorry I'm unable to get the print screen feature on my computer to work so hopfully me discribing it will be enough.

In the manual there are circles with letters in them. The ones i'm looking at have A in one and B in another. They have little arrows going to them. It seems as if they are grounds but I cant find anything to back that up in the front of the wiring manual. The page I'm looking at is Z-44 on the far right side, right of the gauges. Any help would be great.

Thanks
~Luke

look at page Z-46, it's the other half of the diagram.