[Antennas] AH-4 single wire to car's whip's base??

[DavidE Benedict]

I have an Icom AH-4 auto antenna tuner.

What is the best way to attach its single output wire to my mobile whip
when I have 6-7 feet from where I can mount the tuner to where the base of
the whip is mounted on my vehicle?

Thanks in advance for your wisdom.

David
w7dbh