As @TurboTaxVal states the source of the employer contribution number is the W2 entries in "Wages and Income."
Once you enter the Code W in box 12 in TurboTax you will be presented with the opportunity to select to which HSAs the contributions were made. There you can put the amount that went to your spouse's HSA. Keep in mind the amount in Box 12 with a code W is already not included in your taxable income on the W2.
If you or your spouse contributed to an HSA outside of the payroll system, you would add that amount in the editable contributions box on your screenshot.
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