I had one like that it came apart with one of my divers on it luckily he was on the bottom rung when it came loose. I used the mounts and built the ladder above
I just put some 5200 under the mout but mine is open underneath. I took the other ladder off we dive off the boat and that other one is a pain to put up when done. Plus climbing up the ladder on the side with scuba gear on it leans and makes it difficult to climb that’s why I put it on the corner.