@ronvoe
Hi,
Provided you have noted down or photographed the "Powerline Key" (sometimes called "Password") that is printed on a label on the backside of the Powerline adapter you've installed in the nacelle, then yes, you can pair it with another brand new Powerline adapter on the ground level by using the "tpPLC Utility".
https://www.tp-link.com/en/support/faq/1615/
Otherwise you would likely need to physically get access to the Pair button of the Powerline adapter up in the nacelle.
According to the user manual a new TL-PA4010 adapter may also be added by simply plugging it in "near" an existing Powerline adapter, but I would not count on this working over the distance from the ground level to the nacelle.