Source Code for BPEL process: "bpel_PoSendPoToOtm.jar"

Problem Description
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We are trying to integrate OTM with Purchasing through SOA Integration. As per Oracle Documentation "All communication between Oracle Purchasing and Oracle Transportation Management is through the BPEL process PoSendPoToOtm". But we are unable to find the Source Code for "BPEL process: PoSendPoToOtm".

Oracle EBS: 12.1.3
RDBMS: 11.1.0.7.0
Oracle SOA Suite 11.1.1.6
BPEL 1.1
OTM 7.3

Any help is appreciated