There are some issues with my SB2 tribute (2013) and would like to ask for help

1. There is kind of reverb when playing on G and D strings (more on G) . Checked two sets of the strings and its the same , different pickups heights etc. when I set high volume on my neck pickup its really annoying... with low volume is better but loosing a lot of punch. Generally have to really focus on damping strings when playing..a lot of additional reverb/noise in the background. I have to decrease the volume on the knobs quite strongly
I post picture of the electronic . There is weird thing - on the neck knob there are two black cables thare are cut .. my knowledge of the guitar electronics is very small..but is it possible that this is a mistake and two black cables from bridge knob should be soldered to the neck knob instead? Or it just doesen't change anything. Unfortunetely I can't record anything since my music card is broken. There is one luthier in area I live but far away..so want to ask here first. Or maybe go to shop where I bought it - but they will take it for weeks probably.
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2. There is additional hole in the neck ...why? can it have an effect on sound?
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Thanks for help in advance ! ( and sorry for mistakes:) )