1992 Honda Accord tcm

Transmission problem
1992 Honda Accord 4 cyl Two Wheel Drive Automatic 161k miles

I have been to one national transmission company to attempt to figure out why my tranny won't shift. The light stays on green in drive no matter what gear it is in.
This first company told me they were going to do an electrical diagnosis. Whether they did or not I wasn't to know until quite sometime later. After about forty minutes the gentlrman came in and said it was my TCM and he could order me one for the next day at the cost of $360.00. So I agreed then he requested a deposit of $100.00 dollars. Which I did. Come the next day I drove the car back to have the tcm installed. It took all of 15 minutes before he came back and said it wasn't the tcm and I would need a new tranny at a cost of $1800.00 to $2000.00 I asked for my deposit back as he wouldn't let me see the so called new one and he refused. Well so much for that lesson.
I then took it to a family owned business and told them what this guy did and they told me they get alot of thier customers.
So Ron actually did an electrical diagnosis at a discount. I learned it takes about an hour to do one right. Well he was able to get it to shift with the original tcm but then it shorted out again. I learned that the tcm has to be programed and matched to the tranny, you can't just pull one off of a junker and use it. I am still waiting to hear back from him as he told me it might be a week before he could get one. Oh, I forgot to say that the first guy returned my car with no radio and my muffler was rattling quite severly. I am sorry for rambling on.

My question is can you tell me what the TCM looks like or perhaps provide a picture? And where is it located on the car? Don't worry about everything else I guess I was mostly venting.

I would really appreciate it if you could answer those two questions.
Kind Regards,
Burndoc