ec2 module: volumes parameter: How to specify volume id?

The volumes parameter of the ec2_module allows us to specify volumes to create on startup.

Can it also be used to specify an existing volume_id to attach? From the wording it doesn’t sound like it is only for creating volumes, which makes me think it can use existing ones as well?

If so, what is the parameter name to use? (Have tried id, volume, and volume_id).