Next up you put it all back together and start riveting.  You do the top rivets on every rib and then you come back and do all the rivets on a rib from the aft in to the leading edge.

The last two pictures show the inboard rib with the strap all riveted in place. The last picture also shows the next rib riveted down to the last four rivets.  On the top surface of the leading edge, because of the tighter curve, the rivets will fall out before you can get the rivet gun in place when you try and rivet in the fixture.  You could use rivet tape to hold them in place but I just left them all undone and came back and did them with a different method.