TestLink has a very nice feature, Platforms. Useful specially if you have tests that run is some specific environment and you use some logic (like pairwise) to choose what is going to be tested.
As well as attachments, the only way to use Platforms while integrating Jenkins and TestLink is using TAP. You have to create a YAMLish entry like the following.
1..3 ok 1 ok 2 --- extensions: TestLink: Platform: EC1 ... ok 3
As you can see above, the TAP Stream has the platform EC1. The plug-in scans a TAP Stream looking for this entry structure in each test result and in the test plan.