letted

Hi
mechanic says i'm missing a bolt and nut assembly at end of throttle cable of 1987 4runner, 22RE, EFI...think I'm gonna replace engine and probably require this part or assembly that fell off or got lost. Can someone provide blowup .JPG
of throttle body closeup showing this assembly?, maybe I can get it at junk yard and not have to replace the whole throttle body..gap space where the bolt fits is about 1 1/2- inches and hole is about size of a buckshot bb.

I don't know what I'm looking for...yeah, mechanic could have been more descriptive..This may or may not have any bearing on idle, which is terrible due to burnt valve or bad cylinder #2=90psi, not gonna do bits and pieces, longblock or junk SUV...I know the idle is the screw up top in front of throttle body but it does nothing any longer.
thanks.
lette