fig9 above the second hinge parts 46 1 46 2 the rear edge of the two parallel lid side walls 42 44 and of the covering wall 41 springs back a little in the open position of the housing lid 4 the edge of the housing lid 4 which protrudes backward is in contact with the edge of the housing base 3 which protrudes forward see fig9 with the bearing eyes 47 1 47 2 the housing lid 4 can be snapped onto the fully cylindrical base 25 1 25 2 of the spigots 24 1 24 2 so that the partially cylindrical spigot parts 26 1 26 2 extend into the sleeves 48 1 48 2 see fig7 b and 9 the front lid side wall 43 has a locking hook 52 which protrudes from the lower edge of the lid side wall 43 the locking hook 52 is strip shaped and at the bottom has a hook end 53 which protrudes inward the locking hook 52 is connected in one piece with a strip shaped section 54 at the lower edge of the front lid side wall 43 at the top the strip shaped section 54 is separated from the rest of the front lid side wall 43 by slots 55 above the strip shaped section 54 the locking hook 52 is connected in one piece with a pushbutton 56 which is disposed in a complementary recess 57 in the front lid side wall 43 the locking hook 52 can be swiveled towards the outside by pressing the pushbutton 56 when the housing lid 4 is closed.