Hello. I got a couple sweet seatbelt straps from the fuz but am having trouble attaching. The one attached no problem to my JVC m70 but can’t attach to my Nippon fs2440. The box seems brand new so maybe it’s just deaf I don’t want to force it it seems like it might break. Any suggestions? The Nippon came with original box, styrofoam and manual. Looks like it’s never been used.