If your AV receiver has an auto set up mode with a mic then use it.
If not then you will need to do a manual set up.
There will be a speaker set up menu when you will enter that you have three front speakers and surround speakers but no rear surround speakers. If you set a speaker to large it will produce bass so if it's a small speaker it will play louder if it's set to small. Usually the fronts would be set to large if there is no powered subwoofer.
You also have to set the distance each speaker is from your listening position and the level so the volume when the test noise is played is the same.
Best thing is to follow the owners manual of the receiver.