I can not describe it here, but it does require a push-pull-turn-twist-squeeze, type of movement.
From memory, the line has to be lightly pinched/flexed, to get it all through the aperture. For the record, you are not missing anything important, as long as you have all the bolts out and it’s wobbling around like a cock in a sock, you are on the right track..
I have had mine (‘07 Norge), out a few times to change filters and fix the sensor to get the gauge to work properly
