The inner end of the radiator support bracket attaches to the radiator U-support with 2 bolts. The inner fender attaches to the support with 4 bolts, 2 of which also hold the horn in place.

These bolts also hold the radiator in the U-support. The bolting order, from the outside-in is bolt head, lock washer, washer, inner fender, U-support, radiator, nut. The nuts, incidentally, are captive in the radiator. The replacement radiator shown above did not have these nuts, so I glued them in place, otherwise, I would have needed to drill 4 access holes in the back of the U-support on each side, in order to get at the nuts.