linelock and 2 step, one button?

The button I just bought is in my B&M shifter nob on my pro ratchet shifter.

My thought was one hand on the wheel and one hand on the button/shifter.

Stage at 2,700-2,800 RPM (on the 2 step) as my cam comes on at 3,000.RPM

On green let the converter flash, line loc let's go and two step goes into high all at once with just moving my thumb.

Am I on the right track or no?