I have a 1.5 acre lake. After 2 years from when I stocked it all my fish have repoduced except the channel cats. After some research I built 6 boxes to put in the bottom of my lake so they could spawn in. Should I
1- put them about 6 ft deep and a aim the opening towards the middle of the lake.
2- Do they got to be flat or can they be on a slope. Going to be a little hard finding a perfect flat spot.
3-put them right beside each other or spread them out a little.

I have 3 boxes with 2 spawning boxes on each one with a divider in them.
I also got 1 cream can which I heard does good. And info would help. Thanks.