I want to add an external flasher to my 2100 It looks like I have 2 different types of control boards on my optix heads. It was my understanding that I just jump the 2 pins ti change the pattern. That works on the heads with the 2 pins. The corners and 2 other heads have 6 pins instead of the 2. Those pins have jumpers but putting them on the upper or lower curve pins does not change the pattern. Trying to get them to stay solid so I can use an external flasher any thoughts are advice? I did notice that a couple of the heads have dim wires while others don't. All the heads are optix with built in flashers, I just want to sync them with my own flasher.