What a handsome dog! I have a female Siberian Husky. Whenever she needs to go potty, she gets really excited, moves around a lot, and starts running around looking for corners. As soon as I see this, I take her outside and give her the "Go Potty command". When she goes, I always praise her and reward her with treats and play-time.
Now she has learned the routine so if she needs to go she will go Sit by the back door. I still praise her and reward her after she does her potty outside.
Another thing that really helped when she was young is to set up a very fixed feeding routine. This allows you to anticipate poop time a lot better.
You may also try lengthening your walk. Activity always gets my Siberian ready to go.
Here are some of my potty training experiences with my Siberian Husky -