4 attachment points to the door itself, all have weld-nuts attached to the regulator - they do disappear sometimes - all the screws originally had that putty over them as 'locking' and anti-rattle insurance .... the end of the long arm [away from the regulator] has a flanged peg that goes into the channel in the lower window sash, along with one end of the shorter arm - the other end of the short arm [with the peg on the opposite side of the arm] goes in a small piece of similar channel welded onto the inside of the door ..... 3000 words on
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Bill