Hey all im just about to put my project together but looking on the different ways of putting it together. what would be the best way to make sure its strong.. first image is having the sides underneath with an extra small bit to support. The small bit will be screwed and sides will be glued.

Second image has the side parts directly to the side with the small support underneath.

So question is which will be the best in terms of structual strength? Weight on top will be around 20kg.