Immediately I would say just procure a power source that fits each criteria you have.
Second option, be sure to understand the the elements of the LiPo pack you are going to be working on. Remove the branded PVC wrapping, be sure to save any installed fixtures used to separate or guide the packs output. Eleminate as much residual charge on the pack. Either use discrete removal of any pins that will need to be returned to the junction connector or order new ones. Work one lead at a time, making sure to not have any others exposed or potentially expose. Remove the
Leads you do not feel are adequate and replace with those you do. Rinse and repeat for each lead. Resolder JCT pins to new leads and reassemble connector. Use a good quality PVC Shrink wrap to return everything back to the way it came (save what you newly installed).
If it were me, I would just spend half the time I would doing a rework like that researching the perfect LiPo for my application though