Put the new battery over the holding posts and gently put the cable onto the connecter. Gently push on one side at a time as there are two clasps that keep the cable connected. You will hear two clicks when the cable is seated correctly.

Take the flat part of your spudger and carefully verify the cable is fully seated.

Once the cable is seated, put the four screws back in. This will secure the battery.

Put the screws in loosely until all four are in place before tightening them down.