The OBDLink MX doesn't quite fit in the closed compartment. I use an extension cable
eg
https://www.ebay.com.au/itm/30cm-50c...Z1O37__CHII_uw
I velcroed mine outside the compartment where the leds can be seen. The OBDLink MX has a power saving mode where the green led blinks slowly.
I don't think a manual burn should be done willy nilly, only when a fault has prevented regen and has been repaired.
I think regens vary from about 100km to 500 km. I once checked mine at 350km.