Ammeter in instrument cluster short-circuit

Go to mymopar.com and download your cars Factory Service manual in it will be the wiring diagram. Use it to be sure you got everything put back correctly.

As for spark... If for instance the headlights were on and you put the battery cable back on it would spark. Might be nothing. Make sure everything thing is turned off, doors shut, ignition off etc then touch cable to battery if it Sparks there is an issue some where.