Sex in a wheelchair

so long story short, the man i love got into a bad car wreck. He can feel his legs, move his toes but he does not have control over his legs yet.. he has plenty of upper body strength but he is in a electric chair for the time being. he goes to therapy each week so he will eventually learn to walk again. But In the mean time what some tips on positions we can try? I’m not really comfortable on top but I’m willing to try anything to satisfy him.