Trouble Removing Old Converter

[Casti891]

Hows it going everyone! I just got my new converter/charger and started looking at the power control center and wiring. I have very little experience wiring so i have been taking it slow. The first step would obviously be removing the old converter which doesnt aeem as simple as it sounds. Any tips and tricks would be appreciated! Would prefer not to unplug or disconnect every wire, especially the ones on the left panel if i dont have too. Thanks in advance!

[Casti891]

Update!: With the help of my awesome mom, who i can say is a jack of all trades, and 5 hours of time we got the old converter out and the new one in! Wasnt as hard as i thought i just lacked the basic understanding of wires and electricity. I feel it has opened the door to a lot of ideas and projects for the near future!