I don't know if the bracket is called a motor mount (It only seems to go from the block to the bellhousing) and the bolt that goes through it is on the upper part of the side of the block, the other end of the bracket is bolted to the top right front of the bellhousing..
Bu t anyway, I thought "Maybe the bolt is not tight in the hole" - and sure enough using a 14mm spanner (wrench) I tightened it another 1/2 turn or more and now there's virtually no oil around the bolt head!
And IF it still leaks oil I will slacken this bolt and use some RTV under the head of it.