I'm sorry for not getting back to you sooner. With a massive implementation here in South Africa, The "\n" works; however, it is one endless line and kind of not pretty. :)

Let me give this a go today: Adding it to the server.js
"ssl": {
rejectUnauthorized: true,
ca: fs.readFileSync('/path/to/rds-combined-ca-bundle.pem').toString()

I will post the outcome.

Many Thanks