How to map out a switch network manually

Hi,

I have a remote data centre that I'm trying to map out, without visiting the site and tracing cables. Given that I can access the address table on each switch, what's the easiest way to find out if switch A is connected to switch B? the switches in my DC are stacked, which complicates matters slightly.

For example when I look at my MAC address table, almost all of my switches have a single MAC per port, apart the channel port (I believe this is a link aggregate port) which shows MAC addresses belonging to Dell, Cisco and other devices. How do I know where the channel port plugs into directly? Whether it goes to a Dell switch or say a Cisco switch?

Thanks