Populate Repeating Section using JQuery

Hi, we have this requirement to populate our Nintex form coming from a SQL database and be creating a column and format it to XML to populate it to repeating section control using jQuery. I'm already successful populating generic fields using JQuery Ajax using their clientid

NWF$("#" + txtCompany).val(_resultSet.Company);

but i'm stack on how to populate repeating section control where there is no client id that i can use.

Please help.

Thanks!