Hop-frog

I saw some videos and posts here explaining how to connect the AtGames Sega Flashback HD to a computer via USB, and then to edit the available selection of games using adb. I disassembled my 2017 AtGames Sega Genesis Classic Game Console. This one has Mortal Combat as the featured game on the front of the box and has a smaller case than the Flashback HD. I could not find any USB connector inside the case. I could not recognize anything that might be a connector. Is there any way to connect this device to a computer for revising with adb?