This is a general tech community, mostly centered around news and end-user technology discussions, so it's very unlikely you'll get an answer here. Might want to try asking on Reddit or some dedicated Datto/Connectwise forum.

Strangely enough, I may be able to help...

When creating the component in Datto RMM, you should be able to upload the MSI file. Then you can call it via the script by just giving it the file name (the component uploads the file to the working directory).

For the token, you can create a variable called %token% via the UI, which will cause Datto RMM to prompt the token every time the component is scheduled.

So your batch "script" would be:

msiexec /qn AsioAgentInstaller.msi TOKEN=%token%