Thank you, friend, it's like a lid that sticks out of the tub and is square and connects the hose at the top, it has tartar that covers the outlet and the tub overflows, I don't know if the lid comes out sealed ones and neither that it has inside that can damage with a wire
Hello Miguel, wanting to remove that box or the lid as you say, it will cause you problems later when you want to paste it again, it is better as I tell you to insert the cable with the open ends and give it turns inside the box, without fear, inside there is no nothing, try to pass hot water then and let enough water drain to remove as much of the dirt as possible, it will work noral until you lie again, greetings.