Yes, just connect the HH5 to the TP link from LAN port to LAN port. Turn off DHCP on the HH5 and set its IP address to one outside the DHCP range you have set on the TP Link. I can't remember the default address of the TP Link (Ihave changed mine to something else), but I think it is 192.168.1.1 If it is, then you can leave the HH5 as 192.168.1.254
Yep, that's it.