Replace a KW-NT500HDT in a Motorhome

Recently, we have a customer purchased a universal double din head unit from us. (JOYING)

The universal head unit comes with ISO harness, we should need some installation accessories.

I'm worried this buyer can't find the proper accessories, so I e-mailed him.

Then I got the reply soon. Below is the copy of that e-mail.

Hello Amy,
The unit is to replace a KW-NT500HDT in a motorhome.

I need to find a sleeve compatible with this (if dropbox prompts for login, please cancel the prompt, you don't need to log into dropbox):
https://www.dropbox.com/s/2dzakkzvix9ywa0/JvcSleeve.jpg






Also note in the above photo, the plug that was used is different to the universal plug - I need to swap out one or the other, but I don't mind which.

I would like to use the existing GPS Arial that has been wired to the top of the motorhome. However it's connector is as follows:
https://www.dropbox.com/s/tjm2gvginv7twi9/GpsConnector.jpg






I don't know if there is an adapter plug for this.

JVC KW-NT500HDT instructions below for reference.
http://resources.jvc.com/Resources/00/01/52/LVT2277-002A.pdf

Thank you in advance for a prompt reply!
-





This is my reply:

Hello xx

Glad to receive your message.
I don't prompts for login and check the pictures directly.

1. There should have a original mounting bracket, you just need to remove it, and fix it on Joying main engine with screws.
Then install the main engine to here: https://www.dropbox.com/s/2dzakkzvix9ywa0/JvcSleeve.jpg

2. I can see the plug, but we don't have the proper harness for this. May I know the year and model of your car. We can help you find it online;
such as these site: 
http://www.connects2.co.uk/products
https://www.dynamicsounds.co.uk/

3. If you want to use the previous GPS Arial, you need a adapter. Could you find it?
Here is an Antenna adapter for VW, https://avinusa.com/factory-gps-antenna-adapter.html
Because I don't know the model of your car, I can't help you find the adapter for you, sorry.
This head unit comes with a GPS Arial, you can use it. You can use this GPS Arial if you can't find the adapter.

4. Here is blog about our ISO harness, https://www.carjoying.com/Joying-blog/33.html
You can read it if you need.

If you have questions, please e-mail me again.
Best Regards,
Amy