Picrawler battery installation

My robot hat speaker was damaged during installation because of interference with a heat sink on my Raspberry Pi 3b. So I purchased a new robot hat , CN0425D, and removed the heat sink. The new robot hat comes with a battery. I cannot find a simple way to install the new battery in the Pi crawler. I cannot use the existing battery in the Pi crawler because the battery connector on the old battery case differs from the connector required for the new robot hat.

Please download and follow the manual step by step:Z0102V23-picrawler_594x280mm_5.29.pdf - Google Drive