Hello and welcome to the forum.
Sure, you can remove the back cover and carefully observe the wheels while you turn the dial. Make at least four full turns Left and then each time a gate aligns with the fence change direction. The lock should open and, if you took note of the numbers you changed direction, you have the combination.
Make sure you have the correct combination and try it a few times before locking the safe. If you lock it and the combination was wrong and doesn't work, you can throw away everything.
Cheers
