creating External systems

Hi Gurus,

I am creating external systems for integration, here i have to create external system for WSHRECEIVEPSHIPMENTFROMOTM this element only or crete external systems for below also
WSHSENDDIVYTOOTMSERVICE
WSHSENDITEMREFDATATOOTM
WSHSENDLOCREFDATATOOTM
WSHSENDREFDATASTLTOOTM
WSHSENDTRIPTOOTMSERVICE
WSHSENDTXNTOOTMSERVICE
WMSSENDDOCKDOORTOOTM

please let me know.

Thanks & Regrds
Chandu