Added a 3 section cargo net from amazon to my trunk. Came with mounting screws,attachment points and a nut for them to grab onto. Removed the side trunk screws, pryed the trim back a little and eyed out where would be safe to screw the net holders in at. No interference with the tonneau. Took an extra step and filed down the screw tips incase they rubbed on anything. Made a pilot hold,slowly put the screw through but not all the way so I can add the washer holder. Tightened and put all side screws back in. Took like 20 minutes. Posted via the PriusChat mobile app.
Amazon Link " Zento Deals Heavy Duty Stretchable Black Mesh Net Cargo Trunk Storage Organizer- Keeping Things Secured and More Organize with 4 Plastic Hooks"
I used the Toyota one from my 2012 Prius. Works fine on my Prime. Eventually I will install some D rings on the floor for the bottom. It is working fine not connected for now.
At least on the 2017 they thoughtfully put threaded holes toward the front of the cargo area near where they were on Gen 3. But none toward the rear. I hope they have corrected that in newer model years.
Installed on both cars. If you put it on a Prime or (I assume) a Gen 4, check before putting screws through the trim. Quite a bit of electrical stuff back there. It's a perfect fit on the Gen 2. Prime is not ideal with the low height available, but it looks like it'll work. Of course, if you have a spare tire strapped down back there like I do only half the net is useable.