Right off the bat, you are accessing a switchboard, there is wiring with primary insulation only contained in this, the homeowner exemption does not allow for any work to be done by the home owner in a switchboard, it's also obvious that you are not familiar with how this is wired, I can tell by where you have put the clip on that you are guessing.

Get an electrician involved.

Generally home owners can replace like for like and that's about it, and even then its only if they are competent and have the correct ppe and tools. Its pretty easy to find the rules on this

Found this result (First result when google search for EWRB home owners exemptions)  advising "Home owners are not permitted to install wiring in meter-boxes"

I would suggest calling an electrician to check your work is safe and fit for purpose.