"IF" your Z has an amp then you'll find it by looking in the trunk, look to the bulkhead. If you have the hatch (or the recess if not) it is behind the bulkhead covering to the right side.
https://www.newtis.info/tisv2/a/en/e...i-roa/2bvd9wFK
With your MULF or Combox being on the left side
https://www.newtis.info/tisv2/a/en/e...i-roa/GZLja1dj