Here two rectifier diodes are installed; one between terminal #1 and #5 and one between terminal #2 and #5.
It is CRITICAL that you put the silver banded end towards terminal #5.
These have the leads covered in fiberglas sleeve that does not come in the kit.

FYI: the sleeving is a silicon rubber impregnated fiberglas® made by Varflex in size 24, class HB-1, rubber.