This is the way. OP you just apply online, upload a pic of your MD license and MD permit and it will probably be approved within a day or two at the most.I too did mine through York County Sheriff's (satellite) Office. Super easy.
Schedule your pickup time online, go up there and spend all of 5 minutes for them to have you sign the form, get your picture taken, and walk out with your new laminated PA carry permit.
It's fantastic the way they do it compared to The People's Republic of MD