I made the same mistake on my 97 accord. I cut the factory radio harness and tried to install my new radio (which didn't work). I later found out that there was a $15 harness connector I could've bought and just plugged my new radio right in. I would check your local auto parts store (or walmart) and see if they have a connector for your accord. They had one for mine which I could've used if I knew about it.
1997 Honda Accord SE | JDM F23A | Automatic