that is the expansion valve and there is supposed to be a rubber piece that has has lips to grab onto the body sheel metal encasing the valve and pipes. Go to a suzuki dealer or a good A/C shop and ask for one. with a new item you will need to undo the expansion valve (release and refill gas after vacuum to install it properly.
meanwhile you can get butyl tape and build up a barrier. Dont use foam as it will soak itself and pass water again.
the lower tube is the evaporator drain, very easy fix.