Flamenco-T

I bought a used Apexi AVC-R, first generation....
it has everything complete except the second pressure sender that goes on top of the intake manifold..

here's my question, all I want is to control boost, that's it, I don;t really care for RPM or gear elarning settings and etc...
can I just install the boost sender, hook it up to the harness on the main unit ? do I even have to hook up the ignition sensor and other wires to my ECU ?

I was wondering if that'll have any effect on the B/C..

thanks in advance..

stan