There is a slight variation between the Friendly Mutton Chops style of beard to the regular Mutton Chops.
Friendly Mutton Chops still involve sideburns but these have to extend to the edge of the mouth and have to be connected to a moustache. Keep in mind that the moustache is the main difference.
To grow Friendly Mutton Chops, allow sideburns grow to the corners of your mouth, at the same time allowing the moustache to grow,too.
Allow the two to connected to each other. Then, terminate part of the sideburns by drawing an imaginary vertical line defined at each corner of the mouth.
As with regular mutton chops, the bottom line of the sideburns should be defined along the jaw line.