just FYI- I did not have the actual parts necessary for my M930SPX so I ghetto rigged it, I used zip ties and it worked brilliantly!
I put a ziptie (AKA flex cuffs) on/around the magazine tube (all the way near the bottom) and then another one on the stock, near the thinnest part (the 'handle' area)...
On the TOP zipte, I attached a little loop of cloth (actually procured from a key chain) , it has a loop stiched top (which the flex cuff passes through) and a loop stiched bottom) which the sling connector passes through.
then the bottom , the piece on the stock, I had put a standard but heavy-duty-type quality key ring, through the flex cuff/zip tie before I fastened it. Then I attach the other end of the sling, with the sling connector, to that end .. Trim the ends of the flex cuffs real short and you're golden. IS this the best ideal connection? PRobably not. but it's 100% effective. Especially my shotgun, I generally habe in my hands. IBut I am a FIRM Believer in all longguns having a sling JUST IN CASE.. my Savage Mark II had studs included, so the sling mounted roight on it. The Rem 597, I had studs installed, so a sling was good for that... But the M930SPX just didn't have good sling stuff so I made do, and its all good...Really unique and really effective. Again, not PERFECT, but perfect for me. I could now use it for slinging my shotgun on my shoulder temporarily, I can put it across my back for longer term or say I was carrying my AR, i also want my shotgun with me, I'm all good.
You can also do this for ARs and others.. my S&W M&P 15-22 had no sling attachment.. if I want to use my Magpul MS/2 single point sling I can zip tie on the rear stock area and use a keyring, instant single point sling attachment point.