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how to undo strange bolts for my dodge ram's starter?

i want to change the starter on my dodge ram (2500 diesel 4x4) i have the new starter and everyone that i've talked to has said that it is a simple thing to do. the guide i have only has 5 steps to switch starters around. however the bolts that are holding it in seem bizarre, i cannot seem to get any type of wrench on them at all. i have tried different sizes and styles, metric and imperial, and nothing is working. they don't seem to be normal hexagonal ones instead they seem more like a multi sided star with at least ten "points". is there some type of tool that i'm supposed to be using for them? everything said just use a standard socket or wrench.

also i snapped the small wire that comes off of the starter, can i just put a new end on it and reattach it like normal when i put the new starter in?
ok so torx will work, but i can't find torx anywhere in town, is there some kind of socket or wrench that will work in a pinch?

the three mounting bolts you speak of are 12 point 10mm. bolt so a 12point 10mm wrench or socket will work.