I am trying to set up a bastion host in AWS in order to perform administrative options on an RDS instance in a private subnet. I am following the instructions from the official documentation (https://docs.aws.amazon.com/quickstart/latest/linux-bastion/step1.html), but there it is not clear how the bastion will know which RDS instance to connect to. How would I make sure that it can 'talk to' my intended RDS? (as far as I understand, the key pair is just something I can create anytime and enter to connect to the bastion itself, but not the RDS, or am I wrong?)
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