I am going back to my 30tpifor the winter and I will upgeade the 502...

I have a few questions though,

Can I use the new 502 wiring to 305 tpi? All of the injectors, water, map, throttle positon, air flow sensor sockets are the same but only one issue is confusing me...


As you can see in the picture 502 wiring has 2 sockets for the ecm. there is no such thing on the 305, so if I connect all the other stuff and leave those 2 ecm sockets, will the engine run?

and in the first picture, I am holding a hose from throttle bodies, do you know where does it belong?