When I bought my car the dealer arranged the insurance at 20k. On renewal he asked for 18k plus 800 service charge. Then I found Mr Prakan insurance at 7500 per year!!! Been paying it ever since. There is also Roojai to try.
Is he Thai? You got no chance of dealing with it yourself. Pay a visit to your local Police Office and ask them if they can assist at the same time as donating a 1000 baht to their respect and honour fund!
Just put the place shown that’s nearest to where you will actually be. The information probably won’t be processed by the authorities until 3 months after you have left anyway!!
Most I see are an ordinary machine with a money box attached securely. As said before the payment box can be brought from Amore or Lazada etc and then bolt on to the machine and fit in the power circuit