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Hello and welcome, I am Dr. B.
I am very sorry there wasn't an expert online when you posted your question. Still I do want to leave a note for you. If you are in any doubt he cannot pass urine, this is an emergency. Urinary blockage of the male cat can lead to serious damage and even be fatal if left. So based on his signs this would be a real worry and he should be seen without delay.
Please take care,