Which option do I select for Security Group Source? I am developing my Security Group for a VPC that has my Elasticbeanstalk, RDS and ElastiCache services and I am at this dashboard:



Under Source, it used to be that you could select sg-0x12345-my-application, but now it only gives you the option of Custom, Anywhere or MyIP and I am not sure which one is the equivalent to selecting the security group for the architecture I am building this SG for.
Use Custom and then start typing sg-... and it should pop up a list of available groups.