Hi. I'm pretty sure that either will work, based on what I just read. I use 12v triggers, but it's been three years since I installed them...and I'm too lazy to try and crawl around my entertainment center to unplug them and verify what I used.
You can buy 3.5mm stereo cables (and I imagine mono, too) for really cheap - less than
$1 at monoprice.com (well, $1 plus shipping). So, there isn't much financial risk if it doesn't work. You can also buy mono-to-stereo
adapter plugs, just in case the stereo doesn't work.