Nah you dont want it there. (least most folks wouldnt want it there)
The buffer tube comes off the adapter slide on and the buffer tube goes back on and holds it in place. The attachment point will be right at the back of the reciver on either side (or most likely both sides)
I use this one.
QD one if you like
The asap is nice if you shoot both ways like me. If your sling isnt bungee it makes off hand transitions easier