I consumed alot of tutorials on rigging and this channel is one of the better ones on Youtube

Hardcoded within this script it will always look for left sided objects because the names are set like "dist_l_length_IK0Shape1.distance".

"dist_L_length_ ..."

So in order to make the script work for the right side you have to switch out all "_l_" to "_r_" in the script.
I recommend not doing this by hand but by copy the script and paste it into f.e. ms word and do a search&replace so you don't miss any _l_ by accident.

Hope that helps
greets Oliver