Locate the following:

Two positive battery terminals.

Two positive battery wire glue-points.

This glue may separate from the motherboard while detaching the battery terminals, but this has no significant impact on the device.

Gluing any separated wires back to the motherboard is an optional reassembly step.

One terminal at a time, insert a narrow metal spudger through the metal loop of each terminal from the side and pry upwards away from the front cover to release the terminal from the cover.

A metal spudger is used because it requires significant force to release the positive battery terminals.