Integration of an additional task in SPS fully hosted

We create a device with a PAN1740 and a NFC Reader IC connected over I2C to the DA1450. For the NFC IC we want to implement sw drivers on the Cortex M0 of the DA1580. Where can we integrate our NFC driver code into the SPS source code? Optimally, we could create an own nfc_driver_task (additional to the sps_server_task and the app_task). Is this possible and how are the basic steps of the integration done?