Dear Johan,
I have attached a picture from a keris in front side view, it's the show side.
Normally is a pendok only put-on over the wooden gandar. So you need only to reverse the pendok when possible. Pendoks can be engraved or punched (from front or the back). I haven't noticed until now that the pendok is decorated!
You should provide better and bigger pictures.
Regards,
Detlef