Hello, I am in the design process for a reptile tank that will have two sliding lexan doors in the front.

I'm only working with wood that I have on hand as this is a temporary housing from now until January.

What I need help with figuring out are the corner pieces and how to work in the sliding doors.

Here is a front view of the current concept and a top view of the 4x4 cedar corner pieces that have a 1/2" deep cut for the support beams. I'm just not sure how to fasten them. Should I use pocket holes, or just use this cut design with dowels and wood glue, etc. I have no experience creating a mortise and tenon joint or dovetail.

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The thick black lines around the frosted windows will be plastic rails that I route 1/8" grooves in.

The side wood panels will be OSB with all of the inside sprayed with plasti-dip for moisture protection.

Support boards are pine 2x4 with a 3x6 board just under the windows on the front. The top is going to be a birch veneer plywood.