Help with adding power cap mardave v12

[ch!3f]

Hi guys quick question im trying to sort my mardave out and fit a power cap but ive only got 4 channels on my rx and all 4 are in use.
can i splice in to a fan or will that just drain the cap if the power drops?

Thanks

[fidspeed]

If your running a transponder id be more inclined to splice into that

regards dave

[ch!3f]

Cheers i didnt fancy that just incase it damaged it. Ive spliced in to the power cable from the esc to the battery instead so sorted now.