Hi,
I would strongly recommend that you do the embedded tutorials in the Fusion Documentation and also some of the
Self-Paced Learning to help you to learn fusion faster and better. They can be found here:

It is also much easier for the forum to help you if you attach your file AND a screenshot of what you want to achieve
and what the problem is. You can create a file to export like this:

Time spent on the tutorials and self paced learning will not be wasted. Also check out the three RULES that are pinned to the forum for further guidance.
What you want to do is use the imported connector as a cutting tool to remove the parts of your model that you
don't want. This should be able to be done with the Combine Tool.

When getting rid of unwanted bodies, the preferred way is to use Remove so that if you need to come back later
and fix something then you can. If it is Deleted - its GONE.
Cheers
Andrew