The only difference between freebase nicotine and nicotine salts is that the salts are not producing throat hit when u vape them and so u can use very high amount of nicotine salts without be harsh on the throat..
Thats why salts are used mostly in less powerfull vape devices cause those devices need high nicotine percentage to make up for the low amount of vapor production...
So yeah u can use salts the same way u would use freebase nicotine it just that it will be less harsh on the throat