BEFORE installing the MegaChip, wrap a nylon wire tie around the Agnus socket and tighten it snug. Do not over tighten. This will help keep the Agnus socket from splitting over time. Do NOT use the clip. Find a "thru-hole" that connects to pin 36 on the Gary chip or pin 48 on the 68000 chip and solder the wire from the MegAChip to this hole. It would be best if you remove the Amiga 2000 motherboard, so that you can solder the wire on the solder-side of the thru-hole.
If you do not actually NEED the extra meg of Chip ram, do not bother installing a MegAChip. It does put a lot of stress on the old Agnus socket, and if the socket splits, it is a major repair. So, do not let your ego cause you to damage an otherwise perfect Amiga 2000 motherboard. In most cases, one meg of chip memory is plenty.