Display Shipping Transaction from CRM sales order

Hi

We are on CRM 7.0 EP1.In IC_AGENT role in sales oder,under the Shipping Transactions assignment block , I see the delivery document and goods movement document. when I click on it, it gives me a error: "Mapped logical system ERP is missing in tcode crms_ic_cross_sys "

I added the ERP entry in the tcode with the url and all. It solved the issue and I can now navigate to the ERP delivery and goods move ment doc.

Question : In crms_ic_cross_sys tcode , I have multiple mapplings, how does the system know that for delivery document and good movement doc, the logical system ERP should be used.where is this customizinf maintained

I tried to look at the transaction launcher config, but I was not able to find the link from transaction launcher to navigation profile or business role.

Any ideas ?

Thanks

Swapnil