Mitsu probably installed the full wiring harness and only connected what customers purchased.
I am pretty sure I haven't found them all, I haven't lifted the van yet to look at the bottom of the engine bay and behind the front grille.
It might be interesting to see if other people find the same unused plugs or if they have some with different wire colours.
Did you find unused plugs and connectors in your L400?
Driver Side, Under the Dash
#1 --

#2 --

#3 --

Engine Bay
#4 --
