How to handcuff her when i don't have a headboard?

Me and my girlfriend ordered some handcuffs the other day. But i don't have a headboard, just the frame. We cant have sex in her house due to privacy issues. And we don't want to have sex in my house anywhere but my bed, its just too awkward. Any ideas on what to use in place of the headboard? Maybe i could screw something into the wall, IKD. Please and thanks in advanced.