Do you have the correct probe for this indicator? If not the connector won't do you much good.
Is there an "AN" P/N on your Weston indicator? If so there is a cross-reference somewhere that will tell you what AN probes it will work with. The Weston connectors were usually a threaded or bayonet MS connector. Is this a new install? What aircraft? What carb will the temp probe be installed in?
Cessna offered carb temp systems as an option on a number of models to include most 172s. The easiest way to install this system would be to get a hold of a Cessna parts manual for your D model then look for the Cessna P/Ns either new or used. Given it was a factory option and you use factory P/Ns it is a simple minor alteration to install. And there are usually a lot of used OEM parts out there. What's the last 5 digits of your aircraft S/N and I'll see if I can find a kit number.
Here's a link to the Cessna kit that would install the carb temp system on your S/N aircraft. There might be some minor differences if you compare it to the IPC version for those systems installed during production. Also your S/N is close to the split where Cessna changed how they tracked kits so that may cause some differences as well. Just look for the parts listed and install it per the included instructions. May also want to first review your aircraft to ensure there are no other alterations that could affect this kit install before you buy anymore parts.
FYI: In case the link above times out.
