mystery connections top of throttle body

wondering what these things are for. and part numbers if they have them. i thought i saw a drawing that had tubes hooked up to these elbows that seemed to go to a sensor or connector. any info? thanks

 

Nitrous connection?

 

IDK but I like the idea. Zoom Zoom.

any more guesses?

 

Maybe for a TOYOTA supercharger?

 

I’m thinking coolant passages. That were not used. Or for vacuum lines.

 

This shows the optional configuration. IDK what the options are. And I don't have a searchable copy of the FSM.
I am chasing gatorgrl's solutions, which were the circuit-opening-relay, and EFI relay. still looking for the circuit opening relay for the 1999 model.

but her runner is Gen 2, mine is Gen 3, and the locations of the millions of gadgets is different.

is their a searchable list of all the illustration and part numbers online? that's doesn't take all day?

thanks for whatever knowledge ya gots

 

1 line on Some go to the TVV (Evap) then it is routed to the Charcoal canister and the other would go to the EGR vacuum modulator however not all engine use those connections and what we see in your picture are the Toyota factory dead end plugs on earlier 4 runners and Tacoma's they were used more.

 

Thanks for the info.