The Bolt OBDII comes with a snap-shut plastic housing. This housing, once shut is very hard to open without damaging the housing or maybe even the Printed Circuit Board (PCB) part of the device.
The Bolt comes seated in the lower half of the housing, and is easily lifted out to insert the Nano (4FF) SIM card
The clips displayed below are the fragile snap clips that need to align with the Top housing in order for the unit to close
To close the housing, insert the PCB into the lower housing, and make sure it's aligned and lowered to the bottom of the groove. Align the top housing section and press together
once you have clicked the two housing sections together, you can place the sticker section on the back of the unit, aligning the LED to the hole in the sticker.