The manual says they do, but clearance-wise, for the front ones, I went the other way. I looked at the bolts and they look the same from each end.

 

The direction has to do with the possibility that the up/down motion of the a-arm could cause the nut to loosen, the data suggested this configuration was least likely. I've seen them installed opposite, and also alternating. The engineers had a reason to state it, but is it likely to cause an issue that is something you will have to decide.