Hi SBK:
You will not be able to use BDC because WB01 is not enabled for BDC; you'll be stopped getting the Site Customer created. The only recommeded approach for data migration for Site Master is eCATT. Please read SAP Note 1274501 - Batch input and eCATT in site master on this point.
Regarding distribution of Site Master, please read SAP Note 737239 - Site export/import as of SAP R/3 Retail Release 46C. You should not use WBTE / WBTI.
- Paul
Paul R Gendreau Jr
SAP Retail Inc.