/diy/ - Do It Yourself

preface: im an retard.
on an axial capacitor the plastic side is positive and the metal side is negative... does it mean i attach the leads negative to positive then positive to negative (opposites) or pos to pos and neg to neg (sames)?

also if i wanted to use a small capacitor bundle to smooth and buffer a charge going to a battery (from the charging coil of a small engine) should i put them in front of the positive or negative?