Are you looking for a way to trigger those PCAP downloads so they automatically open in a third party tool? There is a way to do this in Security Analytics 10.4 and above. It does require enabling some settings that may not be enabled by default depending on which version of Security Analytics you are running.
To make your PCAP extractions more efficient do the following steps.
1) Make sure the Download Completed PCAPs setting is enabled. This is available in the Security Analytics interface through the Investigate > Navigate > Settings widget as shown below. The download will still be tracked in the download job queue on the SA server but after completion of the download it will save it to your client machine in your browsers designated download folder.
2) Optionally setup file associations on your operating system so that files with a .pcap extension open in your tool of choice, say Wireshark for example.
Note: Although you can configure this method for downloading files (other then PCAPs) I do not suggest it unless the system you are running your browser on is a machine you are allowed to download and execute malware on. By that I mean the machine is on a segmented network or is a sandboxed virtual machine or some other endpoint software is in place to limit the effect of malware. The reason I bring up this warning is that typically the files being downloaded from Security Analytics are ones suspected of being malware or related to malware and if they are automatically opened by their native application you could end up infecting your own system.