4A-GE MK1 Engine unknown wires

4A-GE MK1 Engine, thing, filter, plugs, found, change, important, cheers, manual, aw11, 1984, mint, site, picked, flawless, unknown, handle, auto, guys, happy, wires

hi there guys i am new to the site and have picked up a MINT 1984 aw11 this thing is flawless! (apart from the auto box) very happy with how well these thing handle o how i wish it was manual... just been going over it and found these 3 plugs when i was under it doing and oil filter change could anyone please help me out here want to know if they very important? cheers!