1937 Pickup Choke and Trottle rods help please

[roadstar]

I got the new knobs and rods and gromets and now have a couple of questions.

My pickup didn't have the original knobs and rods in place so I would like to know how they actually attach.

The knob has a short piece of rod that goes through the dash gromet of course. And the new rod came with a small coupler that slides over the two rods to join them I am assuming. Just wondering how they are attached together, crimped, welded,ect?

Also the truck had a cable style choke installed when I got it. Im pretty sure it is supposed to have the rod style but where the cable came out of the firewall it is attached to the hot air heater duct tube with a small factory looking mount. Would the rod actually go to this mount? The rod fits it but it looks more like a cable clamp to me.

Being it came with the hot air heater there is a knob in the middle of the choke and throttle that says heater. Is this the stock location for the heater knob. I see pics of trucks with just two knobs.

I added the pic with the cable clamped to the air tube on the firewall.

Hope someone can help.