Bidet spray installation in flush tank with inlet on top

[Udhaya Kumar K]

Hi,
I plan to install a bidet spray in my home. This video gave me a good insight:

The big difference between this toilet and mine is the inlet for the flush tank. In my case the inlet is from the top of the flush tank and also close to the wall:

The white pipe is a metal one. Is there a way I fit the 'T' pipe some where in between the water source from wall and the flush tank inlet? What extra items do I need to buy?

 

[Terry]

Normally we would have a shutoff at the wall, and since this is in Europe, you would need to find the thread sizing that is used there and see how that fits up with a bidet spray.