Didnt Know that IKAN Plate existed, but as far as i can tell, that is looking like the EXACT same Product, with the Exception, that the IKAN one comes with that Rod Clamp and a Sticker. There is even a Spot on the Globalmedia-Pro one i own, where the Exact same Size Yellow Sticker would fit, and a Area of Solid Material in the Back of the Plate, where you could easily Drill to Mount the Plate. If you want, i can Post Images of the PCB inside for Comparison, i am Fairly certain That these are Likely made by the Same Company or at least in the Same Factory.
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The Cable you need is a D-Tap to 5.5 x 2.5mm Barrel Jack Adapter Cable. Here are two Examples on German Ebay:
https://www.ebay.de/itm/385207128781 https://www.ebay.de/itm/324734192393 There are Plenty different Styles of those, with Straight Plugs or angled ones, coiled or Straight Cable and Different length, choose whichever fits the needs of your Rig the Best.
Only Important thing is to make sure that it delivers Positive Voltage on the Inside And Negative Voltage on the Outside Barrel of the Barrel Plug.
If it does not, you can usually just open the D-Tap Plug with a single Screw and turn the Insides around to change Polarity.
Should however come with the Correct Polarity by default, but still check it before Plugging it in!
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Another Thing to note is, that this Adapter Plate can only Provide 2A at 19V; and the Chronos as Specified by the Datasheet technically needs 2.1A.
If you Run the Camera without an Internal Battery, this can and usually will cause the Camera to shut off at Random sometimes, especially when stuff like HDMI, Ethernet or External Drives are Plugged in. I Assume, that the Camera can Sometimes Draw more than 2.1A of current for a Brief Moment, and that Triggers some Kind of Over-current Protection inside the Adapter Plate.
Solution to this is, to always run the Camera with the internal Battery in the Camera.
That way, you can also Hot-Swap the V-Mount Batteries, as the Internal Battery will power the Camera for the Time you Swap V-Mount Batteries.