Can I parallel charge with parallel batteries?
You really don't want to do this.  Overdischarging a lithium battery generally damages the electrodes.
In addition, lithium batteries have different charging regimes depending upon cell voltage.
In your case, you need the constant current region for the discharged batteries and you are simply connecting a charged lithium battery which is nominally constant voltage.
An RC (radio-controlled) drone or helicopter charger may be able to recover these.  It may also be able to tell you if the cell is sufficiently damaged that you shouldn't even try.
Please be careful, though.  Those battery packs hold a lot more energy than you think and are quite dangerous.