HAMEG Oscilloscope - Horizontal Slots at The Back

[2X]

Hi,
I have a question where maybe is obvious. At the back of the HAMEG oscilloscope there are two horizontal slots and one hole at the right of them. I beleive these are for routing the power cord, but a retired man told that are for probe holding.
I searched on the internet for pictures but I couldn't find a picture where these slots have something on.
Also, I looked at the HAMEG HM2005 & HM103 Manual but I couldn't find something and there.
Do you know the original purpose of the slots and the hole (at green circle -> maybe is for calibration purposes)?

[Xena E]

Power cord storage.
On the right is the place to lodge the power plug (either 2 pin schuko or type G.)