Do you have the cable? I used a Dorman Help! Brand manual cable on my 1405 and can dig it out to take pics. There was a brass fitting that slides through #2 in your pic and the inner cable passes through that. You'll need to put a hole in your firewall in line with #1 in your pic. I had the control knob mounted under the dash in easy reach and cable wound over the heater box and out the firewall in line with the carb bracket.
I checked around my shop and am pretty sure I gave it away along with the 1405. Check Edelbrock for the carb manual it should have installation tips.