The inboard fuel tank attach “zee” has the bolts on the forward side and the nutplates on the spar. (Backwards to all the others).
Ref 18-09, Figure 1.
FYI - nutplates are tricky! They are part numbered as K-1000 but -3 and -03 are different! Without the zero they are for bolts. So a K1000-3 is for a an3 bolt, but a k1000-06 is for a -6 screw.