Is the pattern different? or,, is the quantity of holes different?
I wanted to add Farmall weights to the JD855,,
both had four holes, but, on different bolt diameters.
I simply took lengths of threaded rod, and bolted the weights to the wheels.
The threaded rod is at an angle,
we simply tightened each rod a little until the weight was centered on the wheel.
The weights were installed in 2016, so, they have been on for almost 6 years,, no problems.
They have even been taken off, and replaced twice due to tire issues, and they went right back on.
If you have the wrong quantity of holes, drilling a hole or two might be a solution.
My SIL thought we were wasting our time adding the weights,,
THEN, after a tire issue, he tried to mow
with the weights removed,,
HE quickly wanted to re-install the weights,
, they made THAT much difference,,