How to create a function and refer a specific record to a lookup field

Hi there,

I created the function below that works quite well. The fuction is intended to copy certain fields from the 'Student_Quote' custom module to the 'Contacts' module.

However, I also want this function to be able to populate a lookup field in the 'Contacts' module with a specific record.

The lookup field's API name is 'New_Visa_Type1', and it is related to the Custom Module 'Visas'. I want this function to always populate this field with the record named '500 - Student visa', which number is 4264242000048152143.

Is this possible?

This is the current function I'm using:

details = zoho.crm.getRecordById("Student_Quote",contId.toLong());

info details;

mp = Map();

mp.put("New_Contract_Type",ifnull(details.get("New_Contract_Type"),""));

mp.put("New_Provider_City",ifnull(details.get("City1"),""));

mp.put("Provider_11",ifnull(details.get("Provider1"),"").get("id"));

mp.put("Provider_21",ifnull(details.get("Provider"),"").get("id"));

mp.put("Provider_31",ifnull(details.get("Provider2"),"").get("id"));

mp.put("No_of_Education_Providers",ifnull(details.get("Number_of_Providers"),""));

mp.put("OSHC",ifnull(details.get("Category"),""));

mp.put("OSHC_Length_Months",ifnull(details.get("Category"),""));

mp.put("New_Visa_Dependants",ifnull(details.get("Category"),""));

upd = zoho.crm.updateRecord("Contacts",Id,mp);

info mp;

info upd;

Thank you in advance!