Help with L023 Dart Battery mounting plate

Got a question and need help on L023 clone. I purchased the trunk mount battery plate kit for the L023 Dart and I’m trying to figure out how and what position the plate was attached to the trunk floor. Can see in pictures of some L023 cars and locations but need more exact positions like measurements from a specific point. And also how the black metal plate is attached to the floor of the trunk. Thanks for any help and possible pictures.

Chuck

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