"I was unable to modify Line 10 A on Form 8889-S to manually enter the $1,000."
That's because the tax code does not allow any amount distributed from your IRA to be treated as an HFD to anyone's HSA other than your own HSA. An HFD to your wife's HSA is only permitted to be made from your wife's IRA. See section 408(d)(9)(B) of the tax code:
https://www.law.cornell.edu/uscode/text/26/408#d_9
