I have rotated this 90 degrees so that down is down.
The signs of water/fluid is fairly obvious (red arrows) as it was in the other shots of Maunder crater. In this one however, there are 2 exit ports (green arrows) the one on the right (dark green arrow) is belching out smoke/steam (light blue arrow) and the one on the left (light green arrow) has fluid coming from it. You can see the fluid going past a dark circular 'crater-type' structure further down the cliff( lower red arrow).
The exit holes have been obscured but you can see them reasonably well in the original and they are pointed out here by the green arrows