Need to post sales through WPUBON with materials sourced from two SLOCS

We sell from a logistic center, located at both sides of a department store. One is a cafeteria the other a Bakery. Obviously they use two storage locations CC0X-00001 and CC0Y-0002. Being that Wpubon defaults to posting to SLOC 0001, can anyone point me in the right direction so as to direct the 251 movement triggered from the Wpubon to use either SLOC base upon an object on a segment of that IDOC ?