Comtel box in 1st picture should be ok for VM, just attach cable at the bottom after removing existing one
2nd photo is of a splitter, presume it’s wires to Comtel box. Should not need this as all cables should be in the install kit.
3rd photo is of old VM telephone socket which is not used anymore. If you have ordered a landline phone it will connect to the hub.
Tudor
There are 10 types of people: those who understand binary and those who don't and F people out of 10 who do not understand hexadecimal c1a2a285948293859940d9a49385a2