Hell no! Don't do that!
Start it up and ride to the BMW dealer, ask kindly for an old fuel pump controller that has gone kaput.
Gut it and roll your own cable like on that link to Tim's method.
Then you can zip tie it to a handy spot under the seat along with a nice little T-10 key and if it really does go tits up lights out on you, you can impress anyone standing around with your mechanical know how and wizardry and solve the problem in about two minutes.
With great knowledge, comes great power, it might even get you laid!