Assuming a one piece 4 bolt front plate, the key is not to twist the plate. Assemble the plate and pre-tighten all 4 bolts until they just make contact, being sure to leave a gap at both the top and bottom. Now as you tighten, remember that both top screws and both bottom screws work as pairs, so keep them matched by tightening them to matched torque, or number of turns. Top/top, bottom/bottom. Work by degrees so you never get far from the matched torques.
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