Elements
Premise
The Premise is the conclusion of an argument.  It is not called a conclusion because each argument map may itself be used in a larger argument.
So the definition of an argument changes from
A series of premises to support a conclusion.
to
A series of reasons and objections to support a premise
where a premise itself may be a reason or objection in a subsequent argument.
Reason
This is a premise in favour of the main premise or conclusion.
Objection
This is a premise against the main premise or conclusion.
Helper
This is a premise that works in conjunction with the associated reason or objection.