Actually the opposite, wing mounted mass will lower the overall structural loading on a wing in a high G turn
er....
ummm....
ah...
absolutely or relatively?
if the option is between having a load on the fuselage or on the wings, quite correct.
If the mass is just added as "wing-mounted mass will lower the overall structural loading on a wing in a high G turn", then.... er... nope. The only thing that affects the wing bending moment is the load at the wing root, the mass of the fuselage. Adding a decorative load to the wings without removing same from the fuselage isn't going to change the outcome, other than increasing the CL required to achieve a certain g loading if the whole weight is greater as a result of the decorative bangles applied to the wings.