How to attatch fireworks to 3d google maps models without having to do it everytime you place a firework?

Hello i need some help with something, i havent used FWsim for quite sometime and it seems to have changed around how you place positions etc.

I want to place fireworks on the top of the London eye whilst the position line was just below it and the fireworks would attach to the surface whilst being in the selected position but i used to be able to save the position for my next set of fireworks now it just goes back to the positon that has been created and it doesnt stick to the top of the london eye

Its hard to explain so i have attatched a video but yeah if anyone could help that would be amazing