I am building a plyometric jumping box using 3/4 plywood with about a 7
degree taper (to avoid tip over) with a platform size of 20 x 24. There will
be 5 total boards; front, rear, right, left and a center for extra strength.
I am thinking about dadoing the corners and the center on the front and rear
boards for the sides to slide into to gain extra strength and stability as
opposed to just butting the ends together with glue and nails.

Is dadoing a better option? I know it's probably not the strongest
connection compared to a dovetail or something else, but I don't have a
dovetail template. Therefore, will the dado be sufficient or is something
else better?

Thank you