I cannot see grafting instructions on pattern, I have never grafted as I usually pick up the stitches, problem is when I google it it shows grafting of 2 x live stitches this grafting is done on front edging and on collar:
https://www.bergeredefrance.com/veste-a-torsades-1.html
Collar: Graft collar to neck edge ( see Grafting instructions). Fold it in half to WS and hem in place.
Edgings: Graft Edging 1 to edge of left front up to top of collar, then graft Edging 2 to edge of right front (see Grafting a border instructions).