netgear nighthawrk m2 help

hi i am new and just got the netgear nighthawk m2 but im trying to use the Ethernet port to plug the cable into my android box but cannot seem to get it working 

ive tryed one way witch is going onto the netgear app then to mobile router setup 

then to ip passthrough then i turn on disables wifi on mobile router 

then to DHCP  where it says 

use mobile router as DHCP is ticked

TETHERING 

turn of wifi when tethering is turned off 

ETHERNET is disabled 

just need some help please as its driving me mad

im trying to just use my ethernet cable for my box so the box picks it up as just ethernet is plugged in

thanks