>>1045420It might look unusual on trams, but on electric train engines with two pantographs, it seems to be preferred to use the one with the bend facing backwards, though there are also several exceptions.
Also on bidirectional trams, train engines and EMUs with only one pantograph, it will always face in that direction half of the time, including high speed trains where the forces on the pantographs are higher than trams.
So it doesn't really seem to matter.
