Can I add Products to Potentials via xml?

Can I add Products to Potentials via xml?

We are in the process of designing scripts to load our existing data into ZOHO. I have successfully built Potentials and Products via the CRM API. Now the issue is can I add Products to Potentials? It looks like updateRelatedRecords is the closest method I can find. In order for us to use this system, I will have to add several thousand Potentials each will require between 1 and 4 Products so I want to add via the API and not manually.