Where is the diagnostics port located?

I found out that I can do the Maryland emissions test and save $4 using a self-service kiosk so watched a video on line to find out how to do this. However, I cannot find the port where you plug in the emissions meter! I saw some previous posts asking this question and the answer was it is to the left of the steering wheel and somewhere near the gas cap lever. One reply was "Oh, it was right in front of my nose!" Is this something that can be seen from a normal position because I have looked all around and do not see it? Is there a cover? I can feel something when I put my hand underneath the dash, to the right the gas cap lever and towards the back. Is that it? I am not able to see it unless I contort myself into an impossible position on the floor.

I'd much appreciate it if someone would describe the location and post a picture because I have no idea what to look for.

2016 Prius

 

Thanks. So yeah, totally visible right in front of my nose as long as my head is on the floor under the panel facing up, right?

 

I don't know but I assume there is only one socket where you can plug in a diagnostic monitor.

 

Thanks. I'm not sure I'll be able to get down there to plug in the scanner.

 

50 bucks??!! In Maryland, the emissions test (every two years) costs $14, or $10 at the do-it-yourself kiosk. This is the first time I saw this option. When I got the notice, it said it costs less at the 24-hour kiosk, but didn't explain what it was. I thought it was just a different payment option. But when I went to the website, I saw that you can actually do the test yourself.

 

It used to be exempt in Maryland too.