u can "push" the odb connection backwards so it disconnects from its housing.
+1 agreed, this way it makes it easy to restore back to factory and allows you to use that section for a more useful interface.
otherwise you can also make a small extension but unscrewing the plug is quicker
Just so you know, they check your OBD port for tampering when you go in for an inspection. When I went in for mine, I told the guy I have an onboard computer that connects to OBD. He told me to leave, disconnect it, come back and not mention it to him As long as you can restore it to its original condition, you can push the port in and hide the ElmScan unit that way, but I'd triple check that it's reversible.