Some current records do not have a line or a groom's name. They start out with one of the other columns and nothing is there to indicate whether this information is for the bride or the groom. By looking at the column numbers, you can determine which columns on the grid to use.
Columns 2 through 9 are for the groom even if you do not have his name.
Columns 10 through 17 are for the bride even if you do not have her name.
If no line number is given, start numbering each line in the grid sequentially even if the line on the image is blank.