Star Wars Battleship Type electronic Game?

My brother and I found a Star Wars game in our garage that used to belong to our uncle. It's electronic, and we finally got the batteries in it, but all it's doing is light up. We want to start playing it, but there were no instructions in the box. All it has are all the pieces. The game is called "Star Wars Galactic Battle" and if anyone could help us to start it so we can have the audio and all that, I'd be really grateful. It's an old game, but it didn't have batteries in it before we found it. Thank you if you can help!