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Originally Posted by igorjavaroni

Did you say like this?
Where exactly I should connect?

You have your mecanum drive VI currently set to Polar mode. While this does have it's advantages, it is only useful if you have more advanced programming capability. You need to set it to Cartesian mode, where you can directly wire in an x, y, and rotation value, in addition to a gyro angle input. I will try to get you some screenshots from our last year's code tomorrow.

EDIT: From what I understand from your original post, what you are trying to do is have your robot set up where while a button is pressed, it is driven like a standard arcade drive robot, with forward on the joystick corresponding with the robot moving forward with regards to itself, and when the button is not pressed, the robot's direction will be compensated for with the gyro input. If this is the case, you can always leave the robot in Cartesian mode, and use a case structure to replace the gyro value with 0 when you're not using it. I hope this helps!