How to write the script of GDConnector?

I don’t understand how I do all this. But apart from airtable, other apps have also been created in spreadsheet data base. Please help… How to write the script of GD connector?
GDConnectorBetaV2Code.js.txt (6.8 KB)
GDConnectorBetaV2Functions.js.txt (23.2 KB)

I have 2 files in google script, how to paste both of them so that I can get a script link…

follow the instructions by @TimAi2