From past experience, unless that Anderson cover is 100.00% water tight it's best to not use anything at all and just wash the connector out as needed.
I used one of the typical 'red' boots (not an amazing seal) and water collected inside and sat and started to corrode the terminals of the anderson connector. Since just letting it dangle un-booted I have had zero corrosion issues. The water was from water crossings and general road spray. Consider that if this is front or under hood mounted you have vehicle speed helping water get into things.
So, just one thing to evaluate. Your boot appears better, but just ensure it is 100% water tight - if the front IS, then ensure water can't get in from the cable end (electronic grade Silastic etc).
cheers,
george.