I'm gonna diy engine detailing my car engines. I'm gonna use an engine degreaser, a low pressure washer, and engine detailer to shine up the engine like new

my question is do I have to remove the battery connection or remove the entire battery na lang to be safe. or follow those youtube how to's like covering electrical connectors. other than the air intake, alternator, and spark plug connectors, and pa ba dapat i-cover ng plastic?