having a head scratching session on how to wire up me turbo timer

i no it needs to be inline where the ignition connects to the loom

but what wires are what

on the timer i have a Red = 12v
Yellow = Ignition key on 12v
Blue = ACC 12v

there the main ones and the other 2 i can sort hard brake switch and earth

but of the above 3 what wires go to what on the ignition loom?????