Entries from hardcoded category
Give this a try. I'm not 100% sure I've got my site set up the same, but I think it's close.

I have a category group called Categories. It looks like this:

Categories
    b2a    
    b2b
    b2c


I created a section called homeBlocks which is a channel (shouldn't matter).
Then on my entry, I have a Categories field with a handle of categoryOne.

On my template:

{% set category = craft.categories.slug('b2c') %}
{% set entries = craft.entries.section('homeBlocks').relatedTo(category).find() %}

{% if entries | length %}
    {% for entry in entries %}
        &lt;p&gt;{{ entry.title }}&lt;/p&gt;
    {% endfor %}
    {% else %}
        {# No entries found. #}
{% endif %}


I have created 3 entries within my homeBlocks channel, and I've assigned the 1st entry and the 3rd entry to b2c. 

Now I am seeing this when I view the page:

&lt;p&gt;Entry Three&lt;/p&gt;
&lt;p&gt;Entry One&lt;/p&gt;


EDIT

Sorry for the bad info - I think I understand what you are looking for now. I've updated my answer so give it another try.