6.1.8 - KVM through KVM (or how to post an unsearchable question)

I have a Keyboard/Video/Mouse (KVM) switch I'm trying to use between a desktop windows machine and a Windows VM (of course, using KVM).

The VM's edit page in Dynamix only lists "Super Gate Technology Co., Ltd" under USB Devices.

However, if I look at Tools->System Devices, it has:

Bus 004 Device 001: ID 1d6b:0003 Linux Foundation 3.0 root hub
Bus 003 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
Bus 002 Device 002: ID 174c:3074 ASMedia Technology Inc. 
Bus 002 Device 001: ID 1d6b:0003 Linux Foundation 3.0 root hub
Bus 001 Device 006: ID 051d:0002 American Power Conversion Uninterruptible Power Supply
Bus 001 Device 004: ID 174c:2074 ASMedia Technology Inc. 
Bus 001 Device 005: ID 05d5:0624 Super Gate Technology Co., Ltd 
Bus 001 Device 003: ID 0557:7000 ATEN International Co., Ltd Hub
Bus 001 Device 002: ID 090c:1000 Silicon Motion, Inc. - Taiwan (formerly Feiya Technology Corp.) Flash Drive
Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub

which includes:

Bus 001 Device 003: ID 0557:7000 ATEN International Co., Ltd Hub

the ATEN device from my KVM switch, the extra device for the KVM I need to pass through.

So I guess I have two questions

1) Is there an easy way (i.e., not editing the xml directly) of having the ATEN device added?

2) Sounds like there are a number of VM changes in 6.2, will this behave differently?

Thanks