I think kegel as a way to pump more blood into the penis area that is getting jelqed.
So, you decide your erection level (which is actually a way to say how hard is your penis and how much blood there is in it) and after this you just maintain it with kegels. This means that if you want engorgement similar to 60% erection and after , say, 50 strokes you are down to 50% you kegel sometimes to go up to 60% (not erection but engorgement which is actually safer). You do this by going to the end of one jelq stroke and before you release you jelq and grab with the second hand the base and trap the extra blood that came in. Repeat until you are at engorgement level you desire. This is something that only through wet jelqing I was able to achieve…
Getting engorgement through arousal (i.g. porn) can be dangerous if your objective is to jelq with much blood, because tissues get harder and they are sensitive enough and can be damaged (I don’t remember exactly which part of the penis it is, but if you search on erection level you will find reference on this).
Anyway, I am very new to this whole thing and having this in mind, this is how I think about kegels and jelqing combined.