Phone lines shouldn't be connected in "chock block" connectors, scotchloks are fine though, given they have gel inside that keeps the water / moisture out.
If your thinking of doing anything to the wiring, unless you've got your cablers license it's illegal to do so. Might pay to get the installer back if you need the cabling tidied up.
Panels in roof spaces are a bit of a pain, access for servicing etc, not great when you have to crawl in a roof to change a battery.
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