Put it in front of the bridle, then run a small line (bungie) from the base of the forestay (where the tack of the jib is), over the top of the speedpuck, down to the pole in front of the mount. Creates a "shield" that keeps any lines from falling into those spaces. You might need to add a small metal eye to the back of the mount to keep it in place.

The other solution I have seen is put it on the pole inside the bridle, even if the jib sheet is in the way and make a spot in the mount for the jib sheet to run through. I'm not a fan, too much chafe. I've also seen people "hang" the puck under the pole from either position, and just velcro on the puck so that it is right side up.