Help with sump setup

[butt.lemon]

Hello, recently I was handed this 125g aquarium and stand for free from a family member. I want to set it up as a saltwater tank. It has 2 holes drilled in each back corner and an overflow box for each set of holes. It came with no tubing, piping, or sump equipment so I have been trying to figure out how to fit equipment underneath. I have 60”L x 16”W x 8”H of space that I can work with. My height is the killer to this situation. The only thing set in stone is a tank is out of the picture so a shallow storage bin is going to be the way. Any suggestions on how to setup the equipment? I want to do a fleece roller mat but they are way too tall to fit. I’m not afraid to diy all of it so any suggestions are greatly appreciated!

 

[isaacfish]

Can you take a picture of the opening of the underneath and what are the measurements of the opening

 

[butt.lemon]

Can you take a picture of the opening of the underneath and what are the measurements of the opening

As of now there is no opening besides the drawer cut outs. Since I’m adding a sump down there, I am going to cut two openings in. I will update with measurements