wiring a fan to a MM?

[ClodMaxx]

i have an old novak esc fan that i want to wire above my MM to help cool it. my question is where would i solder it? i can't add it to my batt leads, as it'll be getting the full 16.5v when i run at 5s. is there a way to solder it to the caps? i'd rather not have to add a 9v battery just for the fan, as that's one more thing to add weight (and another PITA to have to deal with in general).

any insight would be appreciated.