Yes, I understand it this way as well.

However, it doesn't say in which distance from each other these battalions were deployed one behind the other.

And awaiting the order to attack in a column by battalions, doesn't mean necessarily that they also did advance in this formation.

Maybe memoirs of members of this corps or regimental histories can shed more light on this.

I don't know the strength of the battalions, but probably they had already sustained some losses during the campaign, so that their frontage may not have been very wide.