New Coolant Radiator fitted -Oil Lost!

[Beulahjag]

Dear all, I have today taken delivery of a new Coolant Rad (the one with the Oil connector pipes from what I presume is the auto box?) (mine is a 2.5 auto 2004)

In taking off the old Rad I obviously lost some fluid so will need to replace soonest and before driving.

But can anyone point me to where to locate the filler cap and how would I know how much to put in it?

Thanks

Stuart