Casting on in the middle of a row

I’m making a bag and i’v made the handle, I started with 30 stitches, then knitted 5, casted off 20, then knitted 5, so I now have two groups of 5 with a gap in the middle. It now says ‘knit 5, then cast on 20’ so i tried cable cast on but it doesnt work, my stitches become too tight and its impossible! Help!? Thankyou!!!

At the top of the page under basic techniques your see some cast on videos. What most people use for the middle of the row is backward loop cast on.

Or you could use the knitted CO, it’s not as tight as the cable. When you do cable, you have to keep it loose, don’t pull on the yarn after you have the stitch on the left needle.