Was on a short vacation, so I am catching up reading (and answering)
If you have a unit in line then you would use the following procedure
1) determine the closest stands
2) move the closest stand into contact based on the CENTER point of both stands, and following ALL movement (restriction) rules
3) choose the next stand to move and place it in contact with the first stand moved, again following ALL movement (restriction rules
3a) if a stand can be placed into contact with the original stand AND in frontal contact with A (notice emphasis !!) enemy stand it must do so
3aa) if 3a) is not possible, but C2C is an option then that is acceptable !!
3aaa) if a stand can NOT be placed into enemy contact (on account of movement (restriction) rules) it must still be placed into contact with the original moving stand and MAY end up being in support (ASSUMING it has the movement to make that position !! otherwise it must be placed at the least with a POINT of contact
4) (assuming there is a 3th stand), follow the 3) steps, BUT with the important distinction that it must remain in contact with either one of the previously placed stands !!
And remember that if your guys "can make the distance" they will ALWAYS make as MUCH frontal contact as possible, even potentialy pulling in additional enemy units !! (which in essence is the "maximize frontage" rule)
On a related issue......
When your guys are getting SHOT at on the charge...... you will always determine the effect of shooting BEFORE going into 2) above !!
