Quoted Line Items Subpanel related Quotation in custom module

I have created a Custom Module(COF) in that module when i select the Quotation all fields are auto populate based on Quotation. So how to get that quotation related Quoted Line Items in a custom subpanel after save the COF Form.

 I really need help, as soon as possible.

Thank you..

Auto populate fields when i select quotation  

hatsFrancesca Shiekh