Hello, in my original ceiling light I have three blacks together,yhree reds together and a red with a black with a red sleeve on it.on my new flush fitting light ,I only have a block with three terminals.HELP

How many locations do you have that can switch the light?

Just one location

In my lounge I have 2 ceiling lights,I'm replacing with flush fitting lights.one was straight forward 2 connect,but the other is confusing.
I have 3 blacks together,3 reds together,a black with a red sleeve and a red together,
I'm struggling because new light only has a block connector for 3 connections.
Please help