How to Connect to Multiple Independent Doppler (mySQL) Databases

I have a project which will be developed using Wappler, Doppler, and mySQL. I have developed other websites using Wappler, Doppler, and mySQL. All these websites reside on my localhost (Doppler).

Now, the issue. Say I am developing a new website using the same configuration. But, this new website will need to connect to 2 other mySQL databases that reside on my localhost and all websites will eventually be published as independent droplet accounts.

How would I best configure Wappler to access multiple databases?

Can I access the databases on my localhost for development and make no adjustments upon publication? (My observation is that doppler allows only one domain to run, meaning on one database.)