Supported USB devices are managed in three files: sys/dev/usb/{usbdevs.h,usbdevs_data.h,usbdevs} -- see the instructions in usbdevs for adding this device to the list of Trust products. As described in the instructions, you will still need to modify the appropriate driver's probe to match the device.
FYI: only two Trust products are listed in -current, which is beyond the upcoming 5.2 release:
Code:
/* Trust products */
#define USB_PRODUCT_TRUST_OPTMOUSE 0x0a33 /* Optical Mouse */
#define USB_PRODUCT_TRUST_MOUSE 0x0a37 /* Mouse */