I really don't recommend using Super Tanks, the plugin is old, the author is inactive and has a lot of versions in the thread.
Try
Mutant Tanks plugin.
At least the author is active, always nice and helping. Also seem to have the feature you are asking for.
Btw, if you share your SUPER TANKS plugin .sp file I can try to implement it since I don't know which file you are using. (The main post doesn't compile and Ernecio version gives me invalid gamedata)
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