Ethernet Port Speed

Not sure if V3 is the right version or not. The box it came in says WN3000RP-100NAS

I have a small piece of electronics that seems to need a hard coded 10mb Full Duplex ethernet port. I have the N300 configured as an Extender and attached to my existing WiFi. If I plug a regular PC into the ethernet port, it works. 

If I plug this device I need to use directly into my switch and config my switch port for 10mb/Full, I am able to connect to it. If my switch port is set for Auto/Auto, it will not negotiate/connect to this device I need to connect. 

So what I would like to do is hard configure the ethernet port on the N300 for 10MB/Full. I don't see anywhere that this is possible to do though in the web interface and there appears to be no CLI available. 

Thanks!