How can i connect to my database with a shared hosting plan - from external source?

Hi, first off all i'm getting interested in buying 
Shared hosting plan for 1 year, which is the "Power plan"
but before that i'm getting a lot of doubts about a database connection
so i'll make two basic questions:

Before the questions, Take notes:
1)I'm planning to use inmotion hosting "Power plan" shared hosting, NOT VPS, NOT dedicated servers
2)I'm planning to use inmotion hosting databases from external sources like for example, from AWS lambda with node.js
for certain (mandatory) reasons,

1-How can i connect to an inmotion hosting database with the shared hosting plan from a external server from amazon web services?
For example, i've coded a software and deployed it to aws lambda, but now i want to connect from an aws lambda server to an inmotion hosting database with the shared hosting plan.
How can i get access to that database?

2-What is the connection limit from a database with shared hosting plan?

¡Thanks for reading!
And i need help ASAP before buying it!