The tension bolt head slides into the slot of the tension shackle at the forward end of the nose. It's tension nut pushes against the frame. Try backing the nut off towards the nose to release all tension, then try sliding the tension bolt head into the tension shackle slot. Then tighten the tension bolt nut against the frame until the degree of tautness desired is achieved.
Here's a picture from the for trade thread that illustrates how it goes back together:
