Interfacing BCM2040KFB bt module with arduno

I have a Broadcom BCM204049KFB bluetooth module on an acer ferrari 4000 mouse and i realised that it has 4 pins ,1 for tx ,one for rx ,one for vcc and one for gnd.Then i soldered on them 4 female headers and i tried to connect it with my arduino but i realised that when i put all the wires on the headers the mouse does not work but when i put only the tr,gnd and vcc it works.So i did this post to see if anyone can help get this module work with my arduino .
This is a foto of the mouse