Let me assist you and explain how to prepare your 941.
Line 1 in Form 941 is for the total number of employees. As long as the employee is paid on any pay period within that reporting year, they must be counted and included in Line 1.
Line 5a is for taxable social security wages while Line 5c is for taxable Medicare wages & tips. S-Corp owner's health insurance will show in both lines if you set it up in full taxability. You'll want to review this article to know more on how to record your S-Corp Insurance: Apply S Corp Medical at year end for corporate officers.