How can I help my dog stop peeing on himself?

He is a tripod. We adopted him in October and he had recently had his leg removed. He’s still healing and it’s to no fault of his own. I see him trying different methods and he hasn’t found one that works for him. The smell doesn’t go away with the wipes we use and we’ve been giving him extra baths (stitches are healed so vet said ok). He’s a very good boy and he’s trying.