Custom view (xib) not visible on storyboard

I have a custom view xib where I have multiple TableViews. I am loading this inside a ViewController as a nested view:

ViewController
   |_ View
       |_ View (This is where I load my Custom View)

When I run my app, I can see the empty tables on screen, so my xib is loading correctly.
So far so good.

My problem is, I am unable to see my tables in the storyboard. So I am not able to ctrl+drag and proceed further.

How can I see my custom view inside the storyboard view?

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