Hi Jonathan, Sorry - I'm no sure what you mean. The arm enters the receptacle and pushing it in, the locating nipple 'locates'. I have wondered if I should slide something between the arm and the spring lever to make it a really snug fit, thereby stopping them from parting. I did try this yesterday by trying to insert the end of a tie wrap between the two, but even that was too thick! I don't want to end up messing around with the other - that currently is nice aand tight, so want to leave well alone!