Modelling using reference points

Good morning, I’m trying to make a cube using 8 reference points in an adaptive generic family.
I started from an imported cad instace and with this few nodes I have created the 8 reference points below. Now I need a solution to connect them with a 4 model lines chain and automatically create the solid form. Thanks.

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prova.dyn (22.7 KB) prova2.rfa (396 KB) prove.dxf (307.0 KB)