Pattern help

[Elmirasan]

I'm making an arm warmer and I'm not sure how to work the thumb. Here are the directions


Hand
BOTH SIZES
Dividing Rnd: K2, sl next 6 (8) sts to a holder for thumb, cast on 2 sts, k to end of rnd, 24 (34) sts for hand.
Work in St st worked in the rnd until piece measures about 1 (1 1/2) in. (2.5 (4) cm) from Dividing Rnd.
Work in K1, p1 Rib worked in rnds until about 2 (2 1/2) in. (5 (7) cm) from Dividing Rnd. Bind off.
Thumb
Sl thumb sts back onto 3 double pointed needles, pick up and knit 2 sts across cast on edge of Dividing Rnd. Place
marker for beg of rnd. Join by working the first st on left hand needle with the working yarn from the right hand
needle - 8 (10) sts at the end of this rnd.
Work in St st worked in the rnd until thumb measures 1 in. (2.5 cm) above Dividing Rnd. Bind off

I'm not sure about the portion in red. Thank you for any help!