I own a 2001 Highlander Limited w/ JBL "premium" sound and 6 cd changer. I was wondering, if I buy the 04 camry with the stock radio, am I able to transfer the HU and the external amp from my highlander into the camry? I'm a bit worried that harness/plug that goes into the head unit in the camry won't be the same as the one in the highlander.