This is how i rigged up my license plate. It works pretty well and didnt cost me a penny

mounted the hinge to where the rear reflector mounts. Used a piece of a hanger to give it more of a ridged pull/push. then at the end of the hanger used a piece of guitar string to run up to my broken brake lever that i cut short.

 

nice

i like how you used the brake handle.... will it hold the plate up while riding...(wind, bumps, etc)

 

Yup the handle where i mounted the bolt that goes through the frame isnt completely flat so when i push it down it gets tighter and holds.

 

tight stuff