After removing the old battery, be sure that the battery case or tray and cable connectors are clean. Place the replacement battery so that the negative cable will connect to the negative terminal. Reversing the polarity of the electrical system will severely damage it. After replacing the hold-down bracket, reconnect the positive cable first and then the negative cable. Some more words of caution, do not ever disconnect a battery cable from running engine because the battery acts like a filter for the electrical system.
Unfiltered electricity can damage the electronic components.
Check the electrolyte level before recharging. Do not add water if the electrolyte is covering the top of the plates because during the recharging process, it will warm up and expand. Reinstall the vent caps before recharging and recharge only in well-ventilated areas. No smoking, sparks or open flames because while being recharged, batteries give off explosive gasses. If your battery is the sealed, recharge with low current, five amps or less.