vacuum modulator

After installing a full manual valve body on a c-4, what do you do with the vacuum modulator ? I will assume that you leave it in to plug the hole, but do you leave the holes where the lines go or went plugged or un-plugged ? are ther any adjustments to the modulator neccesary or is it now useless ? thanks , Greg.

Just put a plug over the end of the modulator to keep any water out .