Hello,
If your requirement is to pick up the material from specific storage type and storage bin then go to WM movement type configuration OLML---->Activity----> transfer and for your WM movement type that is responsible for creation of TO, add default storage type and bin in source. In this case I don't think there is requirement to configure storage type search strategy. You can skip that and directly control creation of TO from bin specified in movement type from WM movement type configuration.
!!!ALL THE BEST!!!
Thanks,
Milind