Set up for optik tv

[wireless]

I've got the power cord and the HDMI cord installed between my tv and Set-top ISB7000. The Ethernet cord left by the technician is a 5E. It fits into the network spot in the set-top but does not fit into the wall plug. What am I doing wrong? Do I have the wrong cord?

More... (https://forum.telus.com/t5/Internet-TV-Home-Phone/Set-up-for-optik-tv/m-p/75152#M12384)