Up here it's wasps. They're everywhere and they seem to really like my Deuce. There were many times this summer when I was working with a dozen wasps a foot or less away. I tried some different brands of sprays and nothing worked. They keep coming back. I haven't gotten stung yet, but it's inevitable I guess.I'm not certain, but I think those 6 holes are where the U-Bolts go to support the Convoy Light pole. At least that is what they are for on a 5-Ton... Those little plugs though - are pretty neat if you only have one light pole or maybe none... Less ways for yellow jackets to find a nice place to build a nest. Especially down south.