Is this a typical connection for a TH350 Speedo cable?

On this picture is the Speedo Cable attached to a "GM #3932220 ratio adapter"?

Thanks,
Daniel.

http://www.fbody.pa.20fr.com/cgi-bin/i/th350speedo2.jpg

Here's the picture link.

http://www.fbody.pa.20fr.com/cgi-bin/i/th350speedo2.jpg

Thanks,
Daniel.

http://www.fbody.pa.20fr.com/cgi-bin/i/th350speedo2.jpg

The box is added for rear axles ratios of 4.1X and higher numerical.