2602B channels in parallel for increased current

Is it possible to hook up both channels on my source meter in parallel to increase the current I am able to supply? Using timers in Kiethley TSB, I've been pulsing an LED at 3A with forward voltage under 5V and want to be able to go closer to 6A. Even if I can't reach 6A because my forward voltage goes to high, I want to see how high I can go.

I've quickly tried to modify my script to copy my settings for channel A onto channel B and just connect them in parallel, but my unit keeps getting hung up somewhere when I try and run my script.

Yes, that can be done.

In general, follow the Guidelines for combining SMU outputs in the Reference manual (section 2).

For two current sources in particular, make sure to have the voltage compliance limits a little bit different from each other.

To have same timing behavior from each SMU, use same ranges and other settings on each.

Also, sometimes the order of starting their trigger models matters.  For example, if SMUB is consuming an output event from SMUA to get things started, make sure to call the trigger initiate for SMUB first so that it can be fully armed and awaiting the events.