• I have created a Guitar Lesson post type 
• create custom field group
  • artist
  • key
  • related post (that I can select manually)
• In the guitar lesson post template
  • inserted the bullet list widget
  • added the amount of items needed
  • for the content selected the custom fields I created

the only field I can't find is the "related post" field (see attachments). I am unsure what to do so show that link in the list, please advise.

After a lot of tryouts I figured it out: 

To show the content type before the custom post title I did the following in the widget.

 <div class="uc_image_carousel_content" >
    {% if show_title == "true" %}<div class="uc_post_title">

{% set terms = getPostTerms(item.post.id, "content_type", true) %}

{% for term in terms %}

{{term.name}}

{# also you can use term meta fields #} 
{% set meta_fields = getTermMeta(term.id) %} 
{{meta_fields.fieldname}} 

{% endfor %}
: {{item.post.title|raw}}</div>{% endif %}