Bro, all security systems are a piece of crap .......... Only because they are located in obvious places with open to eye and easily identifiable wires. Just remove a jack or a fuse and you're done with it. Remember.........nothing is fool proof for a person who is determined to steal your car. You have to take advantage of his weakness and that is.......... "TIME". Thiefs don't have time. Do something that wastes his time. All security systems available in the market are actually very good at what they are designed for. Its our stupid, senseless, casual and ignorant electritions who are to be blamed.
I along with my very trustworthy friend installed two systems in mine and his car at my place.......... All by ourselves............. Using proper dodging/confusing wires with proper soldering and jacks and hid the systems in places where even an expert and dedicated thief would require a lot of ample time to sort it out. He would even require to dis mentale the whole dashboard .
Here are a few pics to give you an idea so that you can conclude it yourself. Sorry can't tell you beyond this point onwards......