I would not be comfortable with the positive terminal uncovered so close to the negative terminal and fuel fumes on the side of the carb. An insulated female terminal end might not be required, but could be some help avoiding a spark. See pic. Color will vary by brand and wire gauge.
Detailed meter use basics and testing instructions are below.
That meter looks very familiar. It is very good for what you need to do and is not fragile. It should be helpful and easy to use. I have a second set of leads I extended for testing circuits and grounds, and you may want to do that for a future project.
Even if we do not know how many ohms of resistance the pull off should have, this meter can check for continuity. The ohm symbol is for the numbers in the left lower quadrant of the settings dial, and will measure resistance to electrical flow. The symbol to the right of 200 is a diode, and that can be used to check for continuity, aka if the component or circuit has a continuous path for electricity. Turn the knob there and touch the leads. The readout should go from no reading to (about) zero.
With the car off, remove the two terminals from the choke, and make sure the red (positive) one does not touch anything metal. (A piece of Duck tape or two layers of painters’ tape will temporarily protect it at only 12 volts.) Touch the leads to the two terminals and see if the reading changes. If it does not, the choke pull off is bad. It should be a number more than zero. (Without checking my Holley that’s in winter storage, I cannot give an exact number.)
Next check the ground side of the circuit. Plug only the black ground wire back in. Put one lead of the meter on the - terminal, and touch the other lead to the carb body. It should show zero. Then test between the - terminal and to a bare metal spot on the engine, then to the negative battery terminal. It should give you readings close to what touching the meter leads together does, so close to zero.
The continuity feature is useful for testing bulbs and other grounds. You appear to know how to test if something is getting full power.
I am surprised to not see a mark in the plastic on the choke pull off. If there is none on the Summit part, once you get it adjusted close, I’d use a sharp object to scribe a mark next to the middle of the scale. That way you can see how far you move it for fine tuning or to return it to the right spot after cleaning some time in the future.