If the old cleats are on the old shoe simply measure the distances & move those numbers to the new shoes. Measure on the old shoes from the furthest part of your heel to the center of the cleat. Write that number down, for me in my size 43's its 171mm. That is the fore/aft of your cleat setup.
Next, measure how far over from the inside of the shoe, the widest part, to the center of the cleat. mine is 42mm.
To set up the new cleats I would measure from the heel up to 171mm for fore/aft, then over from the inside of the shoe (inside foot, widest part of shoe) over 42mm. Nowmy cleats are in the same position.
Pay attention to the cleat angle for how your feet like to sit on the pedals. Take a picture of the old shoes with cleats attached for reference.