RB750R2 Runnig 6.39.2

RouterOS General
1

Got 4 New RB750R2’s running 6.39.2

They are talking and routing the info I need just fine I jst want the Leds to light up how do I get the Link Leds to illuminate showing there is a cable plugged in

Thanks

2 
/system leds
set 0 interface=ether1 type=interface-status
set 1 interface=ether2 type=interface-status
set 2 interface=ether3 type=interface-status
set 3 interface=ether4 type=interface-status
set 4 interface=ether5 type=interface-status