Hey there, I am finally trying to get my wipers working, but I'm not sure if I have the right parts. I have a 3 speed or variable speed motor, I'm trying to figure out if my transmission is for a 2 speed or a variable speed because the end of it extends about 1-1/2" - 2" past the back of the motor (see attached pics). Am I missing a part to connect the transmission arm to the motor? Thanks in advance.