Try your best to find the most "gamelan-like" sounds somewhere around the middle of each string. Preferably no buzzing from the clip. This is a suggestion from harp player Sidsel Walstad. Each clip is placed on alternating sides of the harp, making it easier to detach. Before performance, mark up placement on strings with whiteboard pens.

Alligator clips are placed like this, 3 on each side, alternated.

Alligator clips are placed like this, 3 on each side, alternated.