Zoho Creator lookup field, getting contact ID

In my application I have a form Courses and subform Students. In my students subform I have a zoho crm lookup field (looks up contacts) labeled Student Name. How would I get the zoho contact ID of the record that I'm working with. All that I see in the field is what appears to be a concatenated first name and last name of the contact i.e. Bryan Annas. I need to update the record with application values and can't figure out a good way to do so.

Thanks,

Bryan