i got a digital speedo from china off ebay a while back, pretty sure its one of those rip offs of one of the reputable brands but people said it worked fine. so i go to plug her in and realize that there's no hole to screw in the rpm cable that comes from the engine to the speedo. has anyone gotten this speedo or one with a similar problem? if so, how did you solve it?? any help greatly appreciated! also, not as important as the first prioritized problem but also if anyone knows what you need to do to install the magnet and sensor for the road speed then that would be helpful info too, thanks!