U2718Q, no Soundbar mounting brackets

All it has is the rear Audio-Line out to connect to stand alone speakers. You can see in this picture on the sales page that there are no Soundbar mounting brackets;

The sales page also shows the stand alone AE415 speaker system, no Soundbar;

The U2718Q has very thin slots on the bottom that makes it look like Dell will eventually release a sound bar for it, but I didn't want to wait.  I ordered the AE515 sound bar, used a grinder to remove the two tabs on top of it (you can probably cut them off with a sharp knife), then used 3 small tabs (1" long by 0.25" wide) 3M VHB 5952 double sided mounting tape to hold it to the bottom of the U2718Q (3M says the tape holds 90lbs per square inch, three 1"x0.25" strips should be 67lbs of hold). I ordered it from https://amzn.to/2pWYm5a

Exactly what I did with my U3818DW as well.