I have a GL650i. The bars are in a "bow" config and the uppers look like they bolt onto the front engine mounts and the lower section have some trailing bars about 6 or 7 inches long that look like they go rearward to (?).
The bottom trailing bars should bolt onto the exhaust collector box mounting bolts. You may need to get a pair of slightly longer bolts. If they do not, then suspect the setup was not for the GL650.