For the upper tube Toni likes the mask to be visible with the cap facing upwards.
As for the lower tube there is some differences. Mostly do you want the pattern to align with the pen capped or posted or writing. On the Junior series the LARGER diameter is the nib end.
SOME of the gent junior kits are reversed, some have detachable trim rings so you can position it which ever way you wish.
If it is a fountain pen then you have *MORE* alignment issues to contend with, not really a problem but it is something to note. position of the clip when it is posted while writing for example. Double start vs triple start comes into play more so with fountain pens and Toni's blanks due to the pattern IN the blanks.