Nice set up.
Some observation FWIW.
Street side is good but a determined thief will park parallel to the
changer with a big van or SUV blocking the view of their activity and still go for it.
Nothing you can do about that so the goal is to make it appear so difficult, they won't try.
Since thieves are idiots they will still try, lol...
IMHO layering plenty of quality locks is good for slowing them down. Time is your friend and their enemy. The longer they are there, the better the chance they get noticed by you, a customer, or a passerby.
As much as possible, take away their angles to attack a
lock. Welding a block of stainless steel right next to a key hole that faces it will take away drill angles and save you from many amateur attempts.
Try a 'ring' smoke alarm listener in the
changer with two smoke alarms in case they try to torch or cut their way in. When the smoke alarm goes off, the ring does too.
Put 'ring' alarm speakers in the
changer as well so that when the smoke alarms go off, it trips the ring and the ring goes off all over the property.
Place a hidden security camera directly over the
changer and set it to motion so it alerts your phone when someone is at the
changer, I usually turn mine off during the day, except rainy days, because thieves are idiots and try to break in when there is no business and no dough.
I put a custom cut 3/8" thick stainless-steel plate on the front of the
changer door because battery powered tools from Harbor Freight can make short work of a stock
changer door.
Put bollards 48" deep into concrete that are 10 to 12" in diameter in front of it. Fill them with concrete.
Using Red Head fasteners to hold a bollard down is a waste of time because thieves are thieves, and they will use a stolen vehicle to ram it.
With all of that said, your bill
changer isn't going anywhere because even if they smash into it, they won't be able to pick it up, but it'll ruin your day. You can do everything right, but there's always a knucklehead that'll test your security and make for an unexpectedly long day or days.
As an example, a friend of mine had a pretty solid set up at his location and a couple of California's finest stole a dump truck and backed it over his pay station.