The base jump behind a boat: edge up to the crest of one side of the wake, pop, then land on the slope of the opposite wall. The cable has no equivalent — there you land flat.
Wake-to-wake is the mandatory base before grabs, rotations or a raley make any sense at all — consistent, controlled airs come first. The key is not in the jump but in the approach: start the arc toward the wake gently and only finish it explosively just short of the crest. Cut in abruptly and the line goes slack, which costs you exactly the pull that produces height. The second typical mistake is where you aim: many riders jump into the flat water behind the second wall instead of deliberately onto its slope. That incline catches you more softly and often lets you carry on riding. And a limitation that gets overlooked — your attempts are only as good as the wake itself. Every course change the boat makes deforms it briefly, so a straight line at constant speed is the precondition, not a bonus.