Oil/Dist drive gear!

I have two different manuals with different instructions? When #1 Cyl is TDC on compression stroke, one book states that the drive gear slot for the distributor should be "parallel" to the camshaft. (I take that means fore & aft)The other states the slot should be facing or (pointing) to #1 cyl.
Does it really matter? I would think not, due to only #1 maybe off a tad during distrubuter timing setup? :-k

I just want too be sure, and do it right the first time.
Thanks.