Adding latch to Vinotemp

I may have to do something similar with my coolers before long. My 14 month old son just walks around them, but I keep them stacked on top of each other and keep things sitting on top. I guess he see's them both as a table. He has expressed interest a couple of times a while back when he saw my digging around in one. My little girl got into one of them when she was 2 and did a little damage. Dumped 2 boxes of cigars out on the carpet, stepped on a few of them. And broke 2 RP Vintage Robustos, and a Montecristo White Toro in two. Ruined 9 cigars total that day.