The strap by itself wont attach to the splice riggers. The strap on the splices sorta clicks in, but the crowbar strap loops through (here's a thread I made on how to take apart splices, it'll help you understand:
https://www.newschoolers.com/web/forums/readthread/thread_id/493507/ ). HOWEVER, I'm pretty sure that if you do the strap AND riggers from the crowbar, they should attach to the splice frame (I haven't tried this yet, cause I forget before I sold my Crowbars and don't have another pair lying around).