FORD 2010 Expedition v.2 - Manual (Page 349)

4. Make the final connection of the negative (-) cable to the jump
starting stud located in the engine compartment, near the washer fluid
bottle.
Note: Do not attach the negative (-) cable to fuel lines, engine rocker
covers, the intake manifold or electrical components as grounding
points.
WARNING: Do not connect the end of the second cable to the
negative (-) terminal of the battery to be jumped. A spark may
cause an explosion of the gases that surround the battery.
5. Ensure that the cables are clear of fan blades, belts, moving parts of
both engines, or any fuel delivery system parts.
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Roadside Emergencies
349
2010 Expedition (exd)
Owners Guide, 2nd Printing
USA (fus)