Google My Business has removed the automatic creation of a Google+ page for the business. After verifying a new Google Business Page you will notice that the Google+ icon on the info page and the Connect to your Customers, Share an Update on the home page is missing from the Google business account page.
Enable Google+ Page for Business
You get a sense of how bitter the divorce has become between Google My Business and Google+ because there is no link or notification to enable the Google+ page for the business.
Once Verified the Account becomes visible in your View all Brand Accounts: https://myaccount.google.com/brandaccounts
Selecting the new account brings up an empty Google+ page with some featured pages and trending posts. The user needs to select Enable G+.
Select >> Edit Profile, this opens the About section. Add a Tag line and Introduction to your business. If you had not added a logo and header image previously, this can also be added.
Complete your business pages profile.
The G+ icon is now enabled in your Google Business Page dashboard.
If you are going to create a Google+ business page, then I would recommend keeping it active. There is nothing worse then an empty social media channel for a business.