Your starter solenoid is the ropund part attached to the top of
your starter it has the little wire to trigger the starter drive to
engage the flexplate and a big battery wire to spin it hope this
answers you question
either clean and tighten cable connections or get battery
tested. if not the battery, it is the solenoid or the starter If it
is clicking and not starting at first, but starts after a few
tries, its your starter taking a dump. Replace it.