EDI 834 Transaction Map Table - adding a new code

I need to add Plan Type 60 & 61 in EDI 834 Transaction Map Table (Set Up HCM > Product Related > Base Benefits > EDI 834 Transaction Map Table > EDI 834 Transaction Map Table) . However these plan types aren't listed in "Original Value" lookup. Can someone tell me how to add these plan types so that they will be listed in original values lookup?

Thank you