Antennae Repair? 1968 Dart

I am not familiar with all the differences in antennas, but I can tell you that most? all? I've see, the cable is NOT designed to be removed from the base. It is almost always fastened / crimped/ etc permanently into the base The base sees a certain amount of road splash so it needs to be at least "somewhat" waterproof, both above, and below
Cable removed easily from base. Looks like it should. Mast I am confused about. Thanks.