[Towing and towing package]

When I ordered my 2018 Highlander Limited from my Canadian dealer, I requested and got both the 7 pin and a 4 pin connector along with a brake controller. The attached photo shows a 7 pin to 4 pin adapter stuck out from beneath the "7 Way" flap. That was not included. I only added it to test something. To use the 4 pin connector you must unplug the left 4 pin male, thereby making the 7 pin  dead. Silly set up. I bought an aftermarket 7/5 pin replacement to neaten up the installation. See photo on right below.

[2019 highlander front tow hook?]

There are no front tow hooks per se. If you look carefully at each end of the front grill, you may notice a small area of plastic that can be carefully pried out. Located deep inside is a threaded socket that will accept optional eye bolts available through your dealer. I tried to add photos but couldn't. If stuck, pry out the plastic grill caps and screw in the 6" long, .75" diameter eye bolts.

https://www.youtube.com/watch?v=Fh0_OEtuyGI

This video explains it for a 2012 Highlander. I bought a 2018 in Canada and Toyota no longer provides the tow eye bolts as part of the tool package in the trunk. The process is the same.