Original Pi-Top upgraded with Raspberry Pi and Raspberry Pi OS. Need help

Hi all new to the Forum

I picked up two Original Pi-top units in box for a fantastic price. One came with an RPI3 . I loaded up an SD card with Pi-top OS. I found it to be really slow so I bought a brand new RPI5. I loaded the most current version of Raspberry Pi OS 64bit and the thing feels nice and fast now.

I was dissapointed there was no sound so I found a new in box pi-top pulse on ebay. I installed and now I dont know how to get it working on the RPI5. Could really use some help. Thanks!