Are you asking where to mount the sub or the amp you bought? What sub are you running?
Some have corner loaded subs; which would give you the a ability to mount along the back seat.
Some have rear-firing and they mount (when the stock left corner cant handle the size) on the enclosure.
I've seen a few that raise the middle panel of the trunk so they can fit amps in the telematics location.
I personally bought an amp that would fit the stock location and then fire a ported sub directly into the cabin after cutting the armrest/passthrough area out. Keeps the trunk usable too.
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