Ollygc8

Hi just joined Basically im building myself a road rally car an im at the stage of plugging it all back together. I started this 3years ago an i think iv thrown the sigma alarm out. So turn the key all lights are on dash board I have no fuel pump prime an no starter motor. I have one 20pin plug under the dash its white an quite thin witch looking at photos looks like sigma m30. My question is there any way of bypassing the plug or is there any other fuel cut of switches that need to be plugged in.. I work best from looking at photos Any help would be great Cheers olly