Cannot add Nikon film scanner via Virtual Box as USB's cannot be associated....

Older PC with USB's associated with PCI card. Running lubunto 16.04 LTS. USB's do work and hardware is recognized when plugged in. USB itself does not show up in System Profiler but can be found under PCI card host. However, when using Virtual Box for WinXP to run Nikon CoolScan V ED scanner it will not attach as USB not identifiable in VirtualBox. The Guest Additions and VB Extensions have been installed. Prefer to use Nikon software thus do not want to use VueScan as a work around. Is there a way to mount USB or add update to make VB / lubuntu recognize actual USB ports? Thanks!