Hi gracebiz, I hope this is what you are looking to do - To link your site (blog maybe or website for biz) to HubPages:
Go into your profile on HubPages and select edit profile.
Set your cursor where you want your biz web address to show as a link in the text of your profile then select the chain looking icon from the toolbar in the capsule.
A link rectangle pops into the space and that's where you type the http address for your biz.
Then save your changes. You can test it out by signing out then going to your profile and clicking the link you created.
I'm not any sort of an expert - Hope this is what you wanted.