DS-300B transaction key convert

Hello,

I have a Emc ds-300b feature key. Now i want to upgrade the ports one of my SAN switches with its unique transaction key. but I couldn't find any place for converting it. i have used this address: https://licensing.emc.com/#/licenseConversion but it converts only for data domain OS. My SAN switch is emc ds-300b.

Could anybody help me out?