I purchased the JBL nano from eBay for $199. I mounted the JBL in the center of the back seat and it fits perfectly. The factory plug is attached to the harness wiring, just feel for foam covering. There are M6 attachments in the floor, so I mounted two aluminum runners using plastic dowls over the SS screws to make it level with the seat frame. You need to be careful to mount the woofer, so it does not interfere with the parking break. I then used 2” Velcro strips to mount the JBL to the runners. It is easily removable and works perfectly. The only issue is tuning the woofer, for that you need to remove the front trim under the seat set the woofer and put is back in. All in all this is a 3 out of 10 in difficulty.