gl 1100 rear air shocks

[Stevej's wing]

Hi everyone been busy transferring parts from my amazing parts bike with 25000 miles on it.
Going to put the rear air shocks on and was wondering if there is anything I should do to the shocks before installing.
They look almost new but just want to change oil in them and then install.
Where does the oil go in these things and should I use ATF. I was thinking adding the ATF to the air inlet of the shock.

 

[zman]

Something like that, Steve83 has a video of him doing that..yes ATF is what he used but I don't see any reason 10W fork fluid wouldn't work. Seem to remember they needed compression to squeeze the old fluid out but they can be taken apart..Might be better to inspect/clean them inside.