easy to stand next to side case with pocket or holster next to case and slip gun into opened case and vice versa,did it for years before I retired.no one ever saw.
amazon has them for $21.00.comes with cable.this is not fool-proof but if you have an alarm also it's the best I could come up with.I used this as storage while at work.just slipped a j-frame in and out of my pocket into the box.ezpz.It will hold a commander size handgun.google "snapsafe lock...
drill a small hole in the bottom of your side case and run one end of a small cable around your bike frame and the other end to a lock box inside your side case and have an alarm on your bike.this would be if you had to leave your gun,wallet or any valued small item on your bike
here https://www.amazon.com/PIAA-70215-1100X-Powersport-Replacement/dp/B000GU2DEA/ref=sr_1_fkmr0_1?ie=UTF8&qid=1442260648&sr=8-1-fkmr0&keywords=Piaa+Replacement+1100X+Bulb+70215+Replacment+200139