Automatically assigning variables in Unity3d -

i've made path finding utility works fine. each node has neighboring nodes assigned in builtin array, works smoothly. however, @ moment have assigned these neighboring nodes manually circuitous.

the solution want avoid:
1) -and know how to- assign these arrays @ function start(), not able use fast buitlin arrays , starting game takes unnecessarily time.

the solution looking for:
2) assign builtin variables in 'bake-like-manner':
need run script outside game can interact game , assign variables script @ previous solution could, store variables , assign builtins.

i hope explained well.
if unclear i'd pleased clarify.
in advance!