I know there is higher potential for corrosion if you submerge the clamps, but I haven't had much issue with it.
I do prefer to keep the actual battery charger clamp clean and dry though. So I made 2 small cables using alligator clips on both ends and about 18" of #12 stranded wire. I clamp both of them to the submerged pan, and the other ends are clamped to the charger clamp (which is kept dry). These are easy to replace or remake. I like having 2 connection points to the pan. I usually put them on opposite sides, or one on the handle and another on the lip somewhere.
Have done about a dozen pans without any real issues. When I start a new pan I always check the current draw with a clamp on meter. This lets me know I have good connections.
Good Luck!