as i'm sure you've seen before i use two D shackles on the stock recovery points and attach a bridle between them. It's more than sufficient. I have had a landrover discovery winching me out with another discovery, and a landcruiser as anchors and all 3 were moving along when id wouldn't come free!!!! (had to tie to a tree after that )

When not in use i just take the bridle off and leave the shackles








On the rear, again i just use the stock recovery point with a much larger D shackle