Using Docker connections

Hello.

In my setup I have a common parent project that defines a number of build templates that are used in the sub projects. One of those templates builds and pushs a docker image. The problem is that if I define my Docker connection in the parent, all build configurations/chains in all sub-projects require docker. I only have 2 agents that can run docker builds, which means all the sub projects can only run on 2 of my agents which is a bottleneck. The connection can only be defined on the project level, so I can't associate just one build template with the connection. I know I can define the connection at a lower level in the hierarchy, but then I have to manage the credentials for that one connection across the dozens of sub-projects.

 Am I doing something wrong, or do I not understand how the connection is supposed to work?

It seems that If I could get the credentials from a central location (similar to how I can point to an SSH key for a VCS root), it would solve the problem and I could define the connection in multiple places without a maintenance issue.

Thanks, in advance.