
Re: FatMan Power Connector
"DC power jacks" conduct AC as well, they're just called DC power jacks rather than the more verbose "AC/DC power jacks" but they are the same thing.
When installed in the Fatman front panel, each of two connectors to the jack should not make electrical contact with the panel. That's easy enough, just use a plastic DC power jack rather than a metal one.

[The jack shown in this picture has a third connector for a switch, which can be ignored for your application.]