In Websphere 6 ibm-web-bnd.xmi file I have
You'll have to find the corresponding ResourceRef_1294083767913 stanza in web.xml. It should be in this format:
<resource-ref>
<res-ref-name>jdbc/myResRef</res-ref-name>
...
</resource-ref>
In that case, you would add this element to ibm-web-bnd.xml:
<resource-ref name="jdbc/myResRef" binding-name="jdbc/ABC_DEFG"/>
The InfoCenter topic, EJB 3.0 application bindings overview, actually explains the XML bindings format for ibm-ejb-jar.xml, ibm-web-bnd.xml, and ibm-application-client-bnd.xml.