Daishou can connect from the chuanzhang partner practice. If your partner comes in strongly, then continue the movement by pulling. As a practice drill, you can take turns doing the drag, or both drag at the same time. You may just do the grab and lightly tug to get the idea, or you may do a full daishou (as you can see from the dirt on my pants).
Daishou coiling method: partners stand facing each other in mabu. Circle and grab partner's arm lightly. You don't need to do the daishou, just get used to coiling around the arm to get the grab.
Moving step daishou partner drill: the parters do the chuanzhang partner drill and add the daishou to it.
Daishou receiving method:
Power release for daishou: