How to remove front spinning sway link?

[CivicSier]

I need to remove a passenger side sway link but it keeps spinning.

[talonXracer]

The side opposite the nut has two flats cut into it that a thin wrench can be used to hold the link from spinning. The rubber boot may need to be moved a bit to see the flats but they are there.

[makavelibranded]

put an allen wrench in the other side