Cooland Leak

[Lou.Martin at afscn.com]

Greetings from a new '91 200q20v owner.

I've just discovered a coolant leak which occurs after completing my commute
home from work.  Looks like it happened at least once before without me
detecting it.  I attempted to tighten the fitting but don't have the right
sized wrench.  The leak occurs at the larger of 2  brass/bronze hex fittings
attached to a coolant manifold on the right side of the cylinder head.
There are several wires (4?) connected to the bottom of the fitting.  Please
help.

LOU MARTIN
Monument, CO