I found a pic on Google, although it's not the correct model, and have ringed the area I'm talking about, but I can't see how to attach it to this reply, so if you PM me with your email address I'll send it. You might be able to spray without dismantling, or, if not, just undo the screws then release the two internal clips either side allowing you to pull the trim down slightly to get the spray into the groove. Hope this is OK.