Thanks people. I was pretty suprised that I was able to put the cables behind.
Just, that stupid IDE cable is very big, and it looks ugly. Also, as tyou can see in the last picture I cut the case(there was a grill for the fan, but the airflow was almoust 0.
And the wires of that fan are cutted, so I must connect them directly to the molex.
Anyway, I think that this is the best that I can do with this case...
And yes, the temps are excellent for the Celleron.