The bus bar configuration varied by vehicle year & model. Not all have a wire attached.
IF THE IMAGE IS TOO SMALL, click it.
If necessary, the bus bars can be reconfigured by cutting or soldering wires into the unused crimps to create whatever arrangement is needed, like this:
Terminals & wires can also be added to unused locations to keep fuses for new circuits with the originals. Just be careful not to overload any point in the circuit, including the fuse terminal itself, as the NEXT pic shows...
See also:
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https://www.fleet.ford.com/truckbbas/non-html/1997/c37_39_p.pdf http://www.bbbind.com/free_tsb.html 
![05busbars.jpg The bus bar configuration varied by vehicle year & model. Not all have a wire attached.
IF THE IMAGE IS TOO SMALL, click it.
If necessary, the bus bars can be reconfigured by cutting or soldering wires into the unused crimps to create whatever arrangement is needed, like this:
[url=https://www.supermotors.net/registry/media/904649][img]https://www.supermotors.net/getfile/904649/thumbnail/alwaysonpw.jpg[/img][/url]
Terminals & wires can also be added to unused locations to keep fuses for new circuits with the originals. Just be careful not to overload any point in the circuit, including the fuse terminal itself, as the NEXT pic shows...
See also:
[url=https://www.supermotors.net/registry/media/849725][img]https://www.supermotors.net/getfile/849725/thumbnail/fusesblades.jpg[/img][/url] . [url=https://www.supermotors.net/registry/media/830776][img]https://www.supermotors.net/getfile/830776/thumbnail/fusiblelinkrepair.jpg[/img][/url] . [url=https://www.supermotors.net/registry/media/832986][img]https://www.supermotors.net/getfile/832986/thumbnail/bulbsfuseswire.jpg[/img][/url] . [url=https://www.supermotors.net/registry/media/165446][img]https://www.supermotors.net/getfile/165446/thumbnail/fuse-cover-83.jpg[/img][/url] . [url=https://www.supermotors.net/registry/media/830800][img]https://www.supermotors.net/getfile/830800/thumbnail/fuseblock86.jpg[/img][/url] . [url=https://www.supermotors.net/registry/media/834107][img]https://www.supermotors.net/getfile/834107/thumbnail/fuses92f.jpg[/img][/url] . [url=https://www.supermotors.net/registry/media/834106][img]https://www.supermotors.net/getfile/834106/thumbnail/fuses94gas.jpg[/img][/url]
https://www.fleet.ford.com/truckbbas/non-html/1997/c37_39_p.pdf
http://www.bbbind.com/free_tsb.html](https://www.supermotors.net/getfile/405445/fullsize/05busbars.jpg)