Based on where you want the mountains, the easiest and most obvious way is to simply draw the plate boundary along the orogeny line, and have the two plates converging. The southern oceanic plate movement doesn't really make sense - divergent boundaries generally occur in the middle of landmasses, or in the middle of a large ocean. This plate looks like it should be part of the same plate which is converging to the one in the north. The same principle applies to your other oceanic plates - oceanic-continental boundaries as close as this generally only occur when there is subduction, but you have two of them as transform boundaries.