someone gutted out the heat on car. some questions.. need help

I just siliconed some sheet metal over the hole. On the vents I just put them back on. They come in handy on them hot days. For the pass side I took the heater and cut off the vent then put it back on. It gets hot here in SoCal and I am glad I keep them on. Or you could just silicone some sheet metal there too.