Correct documentation for OpportunityContactRole integration

Hi,

The mapping of sales/donations to a contact does not appear to be working, can't quite figure out why.

I've followed the documentation and I can see that it is getting an error from salesforce saying "contactID missing"

See my attached screen shot of the OpportunityContactRole configuration

c) Opportunity Contact Role node -> OpportunityContactRole 
  i) This makes the link between an individual Contact and an Opportunity. 
     The OCR node only stores a field containing the Contact's Salesforce ID. 
     It is necessary since currently you can't do one-to-many mapping using
     the Salesforce API module. Normally, in Salesforce, 
     Opportunities/Donations are linked with Accounts/Organizations, but the
     Ubercart Salesforce Integration module, in its current state, links only
     to individual Contacts. Linkage with Accounts will be added in a later 
     version as an optional add-on module. 
  ii) Fields: 
    1) Contact ID -> Order User's Salesforce UserID [for OCR] 
    2) Donation -> Order Salesforce ID [for OCR] 

Also I'm guessing that your primary setup must deal with mostly Donations, but i guess this could be any donation/sale/purchase etc, however there are only fairly limited fields in the "Fields" drop down (see attached fields.png also)