Welcome to the Corvette forum. Take off the two side extensions on the front of the console and you can see the two studs pg shows in his pic. I used a six inch flex extension from my 1/4" drive set to get to the nuts. I think that's why my back is sore most of the time from laying under dashes.
Be real careful removing it as it is easily breakable up near the top where the sides get real narrow. It's expensive to replace. [
] Good luck with your project.
Just realized that you are dealing with a '77. It might be different.