Well, congrats on the new pet...His previous history is a sad one, albeit a common one due to the new designer phenomena of owning a wild animal or any new dog breed. He may actually not even be a wolf hybrid. Many huskies/shepherd crosses are traded off as wolf hybrids so idiots can make money off them..
Housetraining should be based on the prevention of accidents rather than discipline after the fact. So, if your dog makes a mistake because you didn't get him out when you should have, refrain from any negative discipline.
Since your dog is no longer a young puppy he will have better bowel and bladder control. Place the dog on a regular schedule and take him outside at certain times, whether he needs to eliminate or not - first thing in the morning, after meals and play and the last thing at night. It is essential to accompany him to make certain he is, indeed, eliminating. Dogs are creatures of habit. The more quickly you turn a good behavior into a habit, the faster your training will go.
If you haven't already decided on a crate for your dog, you may want to investigate purchasing one for him. The most effective way to teach him to eliminate outdoors is to prevent him from using the house in the first place.
Dogs are den animals and have an instinct not to soil their den. The crate will become your dog's den.
Confinement to the crate overnight or for a three-to-four-hour period during the day when he is unsupervised will help speed the housetraining process.
Despite your best efforts and diligence an accident may occur. If it should happen, treat the incident in a matter-of-fact manner. It is critical that you not scare or confuse your dog by physical punishment or yelling. The dog won't understand why you're upset, and you are only creating more stress for your dog. Put the dog outdoors or in another room while you clean. If the accident should occur on carpeting use lots of paper towel and blot with fresh paper until you have lifted as much liquid as possible. Neutralize the odor with plain white vinegar and water or a commercial pet-odor eliminator.
Housetraining your older dog requires patience, humor, understanding, compassion and time. He wants to please you by doing the right thing. Help him make the adjustment to his new home a successful one.