Will "hidden" links from other websites help a website?

Hello there.

I manage about 10 websites for different companies in the same city.
I'm thinking of creating a page on each of them that contains links to all others.
This page will be public, crawlable by search engines but not accessible by the main page, an inner page or the menu.
This way, my customers (the owners of the websites) won't complain
that their website links to another website that is irrelevant to what they do.


Is that a good idea? Will Google count these backlinks? The...

Will "hidden" links from other websites help a website?

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