Either side of that large ridge....where the big transition is. You can easily move shallow, or deep from that area. Drill from shallow to deep(er) and jig and run. Isolate a good group of them, and get a good meal.
Sounds easy....right ? Wish it always worked, but you can't beat playing the field. It works better with a sonar, bit gun and run worked since the beginning of ice fishing (I think).
Or work from the southwest to the north east across the two deep spots. My eyes are bad, so I can't see how big the actual lake is
Small acreage or large ?