Defi gauge blue racer "boost"

I was wondering if I can use the stock boost gauge power lines, the red, white, black and orange wires for the power and ground. If so do i just cut the wires to the stock and attach re connect the new wires coming from the new power plug that goes into the gauge itself?

Also can i reuse the hose from the stock gauge? Is the only thing i'm doing with the install is installing the new boost pressure sensor and the gauge, i can keep the stock power wires?

Thanks a ton