AQ Type 4 is actually a pretty good cable (better than Type 2) and should be a good choice as a jumper. The solid core LGC copper, foamed
polyethylene insulation, star-quad geometry, and aggregate 15.5 awg gauge (when connected with one larger and one smaller wire to each polarity), should work just fine for what is essentially a 6-inch speaker cable.
I suggest varying how you have them connected and listening for differences to determine which you prefer. If your main SCs are connected to the LF posts with jumpers connecting to the HF posts, then try it the other way around with the main SCs connected to the HF posts and jumpers to the LF posts. Some folks report improvements by cross-connecting the main SCs with the positive SC connected to the positive HF post and the negative SC connected to the negative LF post and then connecting the jumpers. However you connect them, I doubt you will hear much (if any) improvement when comparing other speaker cable jumpers with the AQ Type 4.
I suggest varying how you have them connected and listening for differences to determine which you prefer. If your main SCs are connected to the LF posts with jumpers connecting to the HF posts, then try it the other way around with the main SCs connected to the HF posts and jumpers to the LF posts. Some folks report improvements by cross-connecting the main SCs with the positive SC connected to the positive HF post and the negative SC connected to the negative LF post and then connecting the jumpers. However you connect them, I doubt you will hear much (if any) improvement when comparing other speaker cable jumpers with the AQ Type 4.