1967 beetle w/sunroof help

i have a 1967 bug and ever since i bought it i have had one provlem. there is a leak coming in through the two back corners of the pan seal. One is behind the battery and one behind the altinator. both os them are under the back heating vents. does anyone know where this leak could be coming from? i got the sunroof to drain properly too. Could the leak be coming from anywhere else? thanks alot for the help.

1600cc H case
stalk trans
behind driver seat is rusting out from this leak