Sorry forgot the name for this connection, but need to know if their are different sizes as am having a bugger of a time trying to connect it up on the new box. Can't even get it started.

Well got it connected. It was what I would call an interference fit. Not sure if it's meant to be or not but it went on with some gentle tapping, ie, a hammer. Probably not good idea but will see if it has caused any problems once I drive the car.

thye should b tight but also they push on easy

make sure the grub screws line up corectly and use some tie wire to lock the in place